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Message boards : Aggie The Pew message board : Astrophotography for rats

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Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 95935 - Posted: 20 Jun 2016 | 22:43:41 UTC

Gents,

Given the new challenge just starting, I would like to present you with the Solstice Sun: http://www.perseus.gr/Astro-Solar-Scenes-Chalkida-Bridge-01.htm.

Van ZimmermanProject donor
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Joined: 30 Aug 12
Posts: 1950
ID: 168418
Credit: 6,025,455,144
RAC: 217,773
Discovered the World's First GFN-20 prime!!!Discovered 2 mega primesFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (20,089,185)Cullen LLR Sapphire: Earned 20,000,000 credits (21,197,588)ESP LLR Sapphire: Earned 20,000,000 credits (20,089,407)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (21,873,609)PPS LLR Sapphire: Earned 20,000,000 credits (21,918,476)PSP LLR Sapphire: Earned 20,000,000 credits (20,117,197)SoB LLR Sapphire: Earned 20,000,000 credits (26,779,370)SR5 LLR Sapphire: Earned 20,000,000 credits (20,278,667)SGS LLR Sapphire: Earned 20,000,000 credits (20,055,153)TRP LLR Sapphire: Earned 20,000,000 credits (20,619,871)Woodall LLR Sapphire: Earned 20,000,000 credits (20,394,541)321 Sieve Sapphire: Earned 20,000,000 credits (27,074,625)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,373,251)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,051,222,753)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,189,695)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,102,079)AP 26/27 Emerald: Earned 50,000,000 credits (60,248,786)GFN Double Ruby: Earned 2,000,000,000 credits (4,414,516,957)PSA Double Bronze: Earned 100,000,000 credits (198,313,575)
Message 95941 - Posted: 21 Jun 2016 | 0:10:13 UTC - in response to Message 95935.

Thats quite the site you got there!

Walter Darimont
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Posts: 237
ID: 99669
Credit: 91,770,595
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Discovered 2 mega primesEliminated 2 conjecture "k"s321 LLR Turquoise: Earned 5,000,000 credits (6,070,979)Cullen LLR Amethyst: Earned 1,000,000 credits (1,263,552)ESP LLR Gold: Earned 500,000 credits (664,491)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (67,751)PPS LLR Ruby: Earned 2,000,000 credits (2,702,172)PSP LLR Ruby: Earned 2,000,000 credits (2,427,260)SoB LLR Turquoise: Earned 5,000,000 credits (6,977,796)SR5 LLR Turquoise: Earned 5,000,000 credits (6,662,501)SGS LLR Amethyst: Earned 1,000,000 credits (1,089,030)TRP LLR Turquoise: Earned 5,000,000 credits (9,537,401)Woodall LLR Ruby: Earned 2,000,000 credits (2,059,365)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (839,377)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (3,004,236)PPS Sieve Sapphire: Earned 20,000,000 credits (24,595,120)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (328,469)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,360,244)AP 26/27 Silver: Earned 100,000 credits (291,096)GFN Jade: Earned 10,000,000 credits (18,534,602)PSA Ruby: Earned 2,000,000 credits (3,295,152)
Message 95942 - Posted: 21 Jun 2016 | 0:24:54 UTC - in response to Message 95935.

Very nice ! Liked the site of the Solar Image Gallery - Analemma as well !
Thanks , Walter

question : what is the most accurate calculation of the life expectancy of the Sun
according to the latest scientific insights ? And how is this calculation done ?

Profile DaveProject donor
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Credit: 802,706,560
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Found 2 primes in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,008,573)Cullen LLR Turquoise: Earned 5,000,000 credits (5,005,909)ESP LLR Turquoise: Earned 5,000,000 credits (5,303,526)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,202,873)PPS LLR Turquoise: Earned 5,000,000 credits (5,461,508)PSP LLR Turquoise: Earned 5,000,000 credits (5,021,564)SoB LLR Turquoise: Earned 5,000,000 credits (8,851,996)SR5 LLR Turquoise: Earned 5,000,000 credits (5,000,482)SGS LLR Turquoise: Earned 5,000,000 credits (5,000,035)TRP LLR Ruby: Earned 2,000,000 credits (3,961,171)Woodall LLR Ruby: Earned 2,000,000 credits (3,007,050)321 Sieve Ruby: Earned 2,000,000 credits (2,435,881)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (268,250)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,502)PPS Sieve Double Silver: Earned 200,000,000 credits (300,002,145)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,133)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,970)AP 26/27 Double Bronze: Earned 100,000,000 credits (113,175,699)GFN Double Bronze: Earned 100,000,000 credits (100,000,025)PSA Double Silver: Earned 200,000,000 credits (200,000,001)
Message 95950 - Posted: 21 Jun 2016 | 8:46:16 UTC

Euvoia must be the shortest word to contain all the vowels.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 95954 - Posted: 21 Jun 2016 | 11:59:58 UTC - in response to Message 95950.
Last modified: 21 Jun 2016 | 12:02:35 UTC

Gents, thanks for the kind words.

Walter, our Sun is of spectral type G2V and which leads us to various extrapolations such as temperature and longevity. As a result, statements of the form "10 billion-yr life span" are based on the G2V spectral type. As for the 4.5 to 4.6 billion yr age of our Sun, this is based on Earth and where geologists (amongst others) have established our planet to be about 4.5-4.6 billion yrs old.

Huge and homogeneous volumes of hydrogen gas and dust collapse due to gravity when a small anomaly is introduced to form stars. The protoplanetary disk which remains following stellar formation leads to the formation of planets. As a result, by knowing the age of the planets (and solar system), we can derive the age of the Sun since the solar system formed immediately after the formation of the Sun.

Dave, very astute observation!

Profile Gary Craig
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Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,553,247)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (207,527)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,606,518)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,381,265)GFN Double Bronze: Earned 100,000,000 credits (175,905,284)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 95970 - Posted: 21 Jun 2016 | 16:03:05 UTC - in response to Message 95950.

Euvoia must be the shortest word to contain all the vowels.

And a word which contains all of the vowels in proper alphabetic order:
"facetious"
You can add "ly" at the end if you want to count "y" as a vowel.
Another one: a word that has three consecutive doubled letters: "bookkeeper".

Thus endeth my English language trivia for the day.

--Gary

Profile Rick Reynolds
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Posts: 7125
ID: 65483
Credit: 3,987,388,845
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Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 95971 - Posted: 21 Jun 2016 | 16:20:41 UTC

That was a great pic btw!

and who says we can't learn something new every day - ya'lls words will come in hand on Word Feud

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 95975 - Posted: 21 Jun 2016 | 19:17:13 UTC

Eunoia has the benefit of being an English word rather than Greek place name while still of the same length and vowel count.

The shortest of all words containing each vowel, pretty much by definition, is Iouea which is a kind of fossil sponge.

DirkProject donor
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Credit: 693,418,395
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Discovered 1 mega primeDiscovered 1 Fermat divisor321 LLR Turquoise: Earned 5,000,000 credits (5,418,357)Cullen LLR Turquoise: Earned 5,000,000 credits (5,256,909)ESP LLR Ruby: Earned 2,000,000 credits (4,186,328)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,689,642)PPS LLR Turquoise: Earned 5,000,000 credits (5,082,092)PSP LLR Ruby: Earned 2,000,000 credits (2,983,690)SoB LLR Turquoise: Earned 5,000,000 credits (5,542,658)SR5 LLR Turquoise: Earned 5,000,000 credits (5,011,433)SGS LLR Turquoise: Earned 5,000,000 credits (5,031,072)TRP LLR Turquoise: Earned 5,000,000 credits (5,149,540)Woodall LLR Turquoise: Earned 5,000,000 credits (5,222,602)321 Sieve Turquoise: Earned 5,000,000 credits (5,028,733)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (201,767)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,158,539)PPS Sieve Double Silver: Earned 200,000,000 credits (283,099,511)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (12,293,182)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,183,808)AP 26/27 Emerald: Earned 50,000,000 credits (50,086,100)GFN Emerald: Earned 50,000,000 credits (70,790,085)PSA Double Silver: Earned 200,000,000 credits (200,004,037)
Message 95995 - Posted: 22 Jun 2016 | 15:18:48 UTC - in response to Message 95975.

Eunoia might well be an English word, but it's evidently as Greek as Euvoia.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 95998 - Posted: 22 Jun 2016 | 16:09:41 UTC - in response to Message 95995.

Eunoia might well be an English word, but it's evidently as Greek as Euvoia.

This is correct.

As a slight diversion, many words which begin with "eu" imply something positive. Aside from eunoia, eulogy also comes to mind.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 95999 - Posted: 22 Jun 2016 | 16:13:12 UTC - in response to Message 95997.

Do you perhaps find G2V type stars in globular clusters like M13?

This is a good question. The problem with globulars is the fact the member stars are very dim for spectroscopy (ie. a lack of sufficient signal). I just checked and studies involve the brightest member stars and invariably and are based on very small sample sizes. Here is a good paper: http://adsabs.harvard.edu/full/1947ApJ...105..204P.

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96000 - Posted: 22 Jun 2016 | 16:17:08 UTC - in response to Message 95998.


As a slight diversion, many words which begin with "eu" imply something positive. Aside from eunoia, eulogy also comes to mind.



And European Union?

Profile DaveProject donor
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Posts: 2575
ID: 130544
Credit: 802,706,560
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Found 2 primes in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,008,573)Cullen LLR Turquoise: Earned 5,000,000 credits (5,005,909)ESP LLR Turquoise: Earned 5,000,000 credits (5,303,526)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,202,873)PPS LLR Turquoise: Earned 5,000,000 credits (5,461,508)PSP LLR Turquoise: Earned 5,000,000 credits (5,021,564)SoB LLR Turquoise: Earned 5,000,000 credits (8,851,996)SR5 LLR Turquoise: Earned 5,000,000 credits (5,000,482)SGS LLR Turquoise: Earned 5,000,000 credits (5,000,035)TRP LLR Ruby: Earned 2,000,000 credits (3,961,171)Woodall LLR Ruby: Earned 2,000,000 credits (3,007,050)321 Sieve Ruby: Earned 2,000,000 credits (2,435,881)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (268,250)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,502)PPS Sieve Double Silver: Earned 200,000,000 credits (300,002,145)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,133)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,970)AP 26/27 Double Bronze: Earned 100,000,000 credits (113,175,699)GFN Double Bronze: Earned 100,000,000 credits (100,000,025)PSA Double Silver: Earned 200,000,000 credits (200,000,001)
Message 96003 - Posted: 22 Jun 2016 | 17:11:41 UTC

I love the European Union, it's my favourite!

...

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96005 - Posted: 22 Jun 2016 | 17:29:12 UTC - in response to Message 96003.

Aggie the Pew hijacking topics since 23 December 2009.

You've just got to love, I think, how well esteemed vermin Anthony starts a thread with a really excellent picture and truly brilliant website and we engage in a discussion of that, science, literature, general p155 taking and politics. It sounds to me how an evening with mates should be

I still have not decided how to vote.

I still love AtP.

Anthony Ayiomamitis
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Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96007 - Posted: 22 Jun 2016 | 17:37:55 UTC - in response to Message 96005.

You've just got to love, I think, how well esteemed vermin Anthony starts a thread with a really excellent picture and truly brilliant website and we engage in a discussion of that, science, literature, general p155 taking and politics. It sounds to me how an evening with mates should be

We are all in the same boat and, to this end, absolutely no problemo!

Eagerly waiting for the moon to become a non-issue (light pollution) so that I can get going under the night sky.

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321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96009 - Posted: 22 Jun 2016 | 18:01:10 UTC - in response to Message 96007.

You've just got to love, I think, how well esteemed vermin Anthony starts a thread with a really excellent picture and truly brilliant website and we engage in a discussion of that, science, literature, general p155 taking and politics. It sounds to me how an evening with mates should be

We are all in the same boat and, to this end, absolutely no problemo!

Eagerly waiting for the moon to become a non-issue (light pollution) so that I can get going under the night sky.



I can't send you a message on this account and I won't under the other.

The point I was trying to make was that we are, I think, great friends. So we can have a wide ranging conversation ranging through almost any subject just like we could if we met socially face to face.

I've certainly very much enjoyed my face to face vermin meetings and would like to do more.

I bought one of these puppies https://www.firstlightoptics.com/william-optics/william-optics-flt-132-ddg.html 3 months ago and have used it in total for nearly 10 minutes. So I am more concerned about cloud cover than a full moon especially as it has not been truly dark here since late May and won't be until late August.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96013 - Posted: 22 Jun 2016 | 19:18:08 UTC - in response to Message 96009.


I bought one of these puppies https://www.firstlightoptics.com/william-optics/william-optics-flt-132-ddg.html 3 months ago and have used it in total for nearly 10 minutes. So I am more concerned about cloud cover than a full moon especially as it has not been truly dark here since late May and won't be until late August.

This is a very good apochromatic refractor and you can do a lot with it given its focal length (925mm), fairly fast optics (f7) and colour correction.

For deep-sky work, you will need a very good mount which will track the sky as well as possible as well as being able to handle the weight of the scope and any additional equipment (camera, adapters etc).

Britain is characterized with very steady skies and which is a real bonus.

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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96015 - Posted: 22 Jun 2016 | 19:47:11 UTC

A random diversion to the topic... but seems as good a fit here as anywhere. I was wondering the other day, if anyone has attempted to optically image the relative difference in motion of parts of a deep sky object through ultra-narrow bandwidth imaging?

I recently got my 2nd PST updated with new objective and have used it exactly once. While I can't say I've experienced it myself, I understand the rotation of the sun is sufficient that differences in tuning of the filter may be needed if you're viewing the approaching edge as opposed to the other. That got me thinking, if it works on the sun, do other bigger and more distant objects show the same effect? Could I try this on a nebula?

Problem 1: the PST has a nominal passband of about 1 angstrom, and I'm not sure that is narrow enough.
Problem 2: the stock PST is f/10 with 40mm aperture, and I have the stock blocking filter, so narrow FOV, slow, and massive vignetting if I use anything other than the tiniest sensors. My upgraded one will be worse as it is still f/10 but with 100mm aperture.
Problem 3: the narrowband filter will likely throw away a lot more light also.
Problem 4: how the hell will I tune it if I can't see anything short of some exceptionally long exposures?
Problem 5: I never did dial in the polar alignment of my mount. It is "good enough" for up to about 4 minutes at 300mm focal length with APS-C sensor. Maybe I can get away with 400mm, if it were not for f/10 compared to the f/2.8 I usually image at. Nearly 4 stops difference, is going to hurt!

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96017 - Posted: 22 Jun 2016 | 20:24:05 UTC - in response to Message 96015.

A random diversion to the topic... but seems as good a fit here as anywhere. I was wondering the other day, if anyone has attempted to optically image the relative difference in motion of parts of a deep sky object through ultra-narrow bandwidth imaging?

I recently got my 2nd PST updated with new objective and have used it exactly once. While I can't say I've experienced it myself, I understand the rotation of the sun is sufficient that differences in tuning of the filter may be needed if you're viewing the approaching edge as opposed to the other. That got me thinking, if it works on the sun, do other bigger and more distant objects show the same effect? Could I try this on a nebula?

Problem 1: the PST has a nominal passband of about 1 angstrom, and I'm not sure that is narrow enough.
Problem 2: the stock PST is f/10 with 40mm aperture, and I have the stock blocking filter, so narrow FOV, slow, and massive vignetting if I use anything other than the tiniest sensors. My upgraded one will be worse as it is still f/10 but with 100mm aperture.
Problem 3: the narrowband filter will likely throw away a lot more light also.
Problem 4: how the hell will I tune it if I can't see anything short of some exceptionally long exposures?
Problem 5: I never did dial in the polar alignment of my mount. It is "good enough" for up to about 4 minutes at 300mm focal length with APS-C sensor. Maybe I can get away with 400mm, if it were not for f/10 compared to the f/2.8 I usually image at. Nearly 4 stops difference, is going to hurt!

Really good seeing other fellow amateurs here!

We do have deep sky objects which are moving away from us very fast while others are approaching us. Since the universe is expanding, there is a general moving away of everything from everything else.

Now, to get back to your thought: you can measure the doppler shift of quasars and where you will easily show them as being red-shifted (ie moving away). However, this entails spectroscopy.

In relation to your PST, it is restricted to h-alpha light and, as a result, you are looking at a very narrow part of the spectrum. We do use h-alpha filters in astrophotography but they are generally of interest for emission nebula which are characterized with h-alpha emissions. Also, h-alpha filters for astrophotography have a bandpass of 3 to 7 nm (depending on manufacturer and taste).

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96018 - Posted: 22 Jun 2016 | 20:28:29 UTC

I have a Coronado SM90 h-alpha filter, received just last month, and which I will put into use at some point this month. I hope to have some cool images of the sun in h-alpha.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96019 - Posted: 22 Jun 2016 | 20:40:16 UTC - in response to Message 96018.
Last modified: 22 Jun 2016 | 20:40:38 UTC

I have a Coronado SM90 h-alpha filter, received just last month, and which I will put into use at some point this month. I hope to have some cool images of the sun in h-alpha.

Unfortunately the filter last month did not arrive in time for the Mercury transit against the Sun's chromosphere but here is my result of Mercury against the Sun's photosphere: http://www.perseus.gr/Astro-Planet-Mer-Transit-2016-Ingress.htm

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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96020 - Posted: 22 Jun 2016 | 21:37:11 UTC - in response to Message 96019.

I already posted my rubbish attempt of the recent Mercury transit in the photo thread. I was travelling for work so no fancy kit. Just a regular DSLR with solar film on the front of the lens.

As for my imaging idea, I'm not trying to measure the overall red-shift, but look for relative differences in red shift in parts of the subject.

Like many, I've tried narrowband imaging already, but how narrow is narrow? I currently have a set of 12nm bandwidth filters. I debated long about replacing them with 3nm ones to see if would help in my light pollution rejection, but these are still too wide for my idea. The PST filter is 0.1nm, and starts to get more interesting, if I can somehow overcome all the other problems listed previously. If parts of the subject are moving differently enough from each other, their peak emission should vary, maybe enough to be detected.

BTW I kinda decided not to try too hard on astrophotography. My location isn't really great for deep sky as I have a lot of light pollution ad unstable city air. Getting away from it isn't realistic. I did play with planets a bit, but they're a bit samey after a while, which I also get a bit of with the sun. Deep sky is the main interest, but unless I move it isn't something I can do to a greater level.

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Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96021 - Posted: 22 Jun 2016 | 22:01:08 UTC - in response to Message 96020.

I already posted my rubbish attempt of the recent Mercury transit in the photo thread. I was travelling for work so no fancy kit. Just a regular DSLR with solar film on the front of the lens.

I will look it up since I missed it. I was battling thin clouds and which impacted my contrast.

As for my imaging idea, I'm not trying to measure the overall red-shift, but look for relative differences in red shift in parts of the subject.

No matter how you cut it, you are looking at spectroscopy. Simply imaging something will not yield the information you are looking for. The only suggestion I can make is to go after stars with high proper motion and which becomes especially noticeable after a few years. Here is Barnard's Star in action:
http://www.perseus.gr/Astro-Star-Dwarf-Barnard-2010.htm

Like many, I've tried narrowband imaging already, but how narrow is narrow? I currently have a set of 12nm bandwidth filters. I debated long about replacing them with 3nm ones to see if would help in my light pollution rejection, but these are still too wide for my idea. The PST filter is 0.1nm, and starts to get more interesting, if I can somehow overcome all the other problems listed previously. If parts of the subject are moving differently enough from each other, their peak emission should vary, maybe enough to be detected.

Filters with a bandpass of 12 nm are way too wide and irrespective of light pollution whereas 3 - 4.5 nm filters will get you really good contrast and will work around light pollution but you will need longer exposures (easily 15-30 minutes per integration). The 0.1 nm for the PST is way too tight.

BTW I kinda decided not to try too hard on astrophotography. My location isn't really great for deep sky as I have a lot of light pollution ad unstable city air. Getting away from it isn't realistic. I did play with planets a bit, but they're a bit samey after a while, which I also get a bit of with the sun. Deep sky is the main interest, but unless I move it isn't something I can do to a greater level.

Have you looked into photometry including variable stars and exoplanet work?

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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96022 - Posted: 22 Jun 2016 | 22:10:22 UTC - in response to Message 96021.
Last modified: 22 Jun 2016 | 22:14:04 UTC

Maybe I'm still not explaining it quite right. I guess you could look at it as spectroscopy, but not in the conventional manner. By taking a series of images (outside normal stacking) with different wavelength regions, I could build up a false colour image showing which regions are emitting which range of bandwidths. Then you could possibly see which areas are relatively moving towards or away from us. As already stated I do not expect this to be an easy or straightforward task, if it is even possible. How much movement would translate into how much shift? Things like that I have to work out. I'm thinking I could pre-calibrate the PST but temperature changes during imaging will likely ruin that. The PST is a low cost option so the filter on that isn't the narrowest. Still, it is all I got that could possibly do this without spending a LOT more cash.

Oh the 12nm filters, cost was a factor. Very roughly, three of those cost around as much as a single 3nm. The other reason was 12nm is much more forgiving of fast objectives. It just about copes with f/2, although I later moved to a slow for me f/2.8. If I went for narrower filters, I'd also have to slow down on imaging...

Edit: http://www.primegrid.com/forum_thread.php?id=4320&nowrap=true#94915 my mercury transit attempts

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Message 96025 - Posted: 23 Jun 2016 | 0:57:27 UTC - in response to Message 96013.

This is a very good apochromatic refractor and you can do a lot with it given its focal length (925mm), fairly fast optics (f7) and colour correction.

For deep-sky work, you will need a very good mount which will track the sky as well as possible as well as being able to handle the weight of the scope and any additional equipment (camera, adapters etc).

Britain is characterized with very steady skies and which is a real bonus.



I have one of these mounts https://www.firstlightoptics.com/skywatcher-mounts/skywatcher-az-eq6-mount.html so it is solid enough I think.

I have to say it is the first time I have heard it said Britain has steady skies. We usually complain it on account of the high humidity and, here in London, the light pollution.

Still the point is moot as it has been overcast pretty much non-stop for months. I offered a prize elsewhere for the faintest object which could be photographed and identified between the offer and a couple of weeks before a Christmas Party. The current leader is at mag minus 26.8 ie the sun.

Like Mackerel I have been wondering what happens using a solar telescope on a deep-sky object. I suspect the combination of Doppler shifts and very narrow filters mean that one will see nothing but this autumn I will try on M42.

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Message 96027 - Posted: 23 Jun 2016 | 4:27:03 UTC - in response to Message 96025.


I have one of these mounts https://www.firstlightoptics.com/skywatcher-mounts/skywatcher-az-eq6-mount.html so it is solid enough I think.

SW makes fairly good mounts. With guiding and periodic error correction, you should be able to produce quality deep sky results.

I have to say it is the first time I have heard it said Britain has steady skies. We usually complain it on account of the high humidity and, here in London, the light pollution.

Actually one reason for the steady skies is indeed the humidity. Some of the best planetary imagers in the world are in the UK and around Selsey.

Like Mackerel I have been wondering what happens using a solar telescope on a deep-sky object. I suspect the combination of Doppler shifts and very narrow filters mean that one will see nothing but this autumn I will try on M42.

Keeping in mind the incredibly tight bandpass on a mag -26.8 olject, anything else relatively much dimmer will not be visible. How about trying it on the moon and which is around mag -12.7 when full?

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Message 96032 - Posted: 23 Jun 2016 | 8:04:19 UTC - in response to Message 96027.

Damian Peach the noted planetary photographer uses http://weather.unisys.com/gfs/gfs.php?inv=0&plot=300&region=eu&t=9p to predict seeing (among other techniques like actually going outside and looking down a telescope).

Purply-pink tends to correlate with good seeing and light blues through greens to red poor seeing.

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Message 96033 - Posted: 23 Jun 2016 | 8:31:59 UTC - in response to Message 96032.

actually going outside and looking down a telescope


Recently, this is where I've been failing...

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Message 96040 - Posted: 23 Jun 2016 | 12:39:01 UTC - in response to Message 96033.

actually going outside and looking down a telescope


Recently, this is where I've been failing...


The best telescope is the one you use Mackerel which is why I think the 65mm altaz refractor I got 50 years ago is best. If there was a hint of a clear sky it'd be out. I was almost as keen as Rick is to get his chopper out.

These days it takes a considerable time to drag at least 100kg of kit including one or two computers out. I have to set it all up and align (although one of these http://www.qhyccd.com/PoleMaster.html has speeded alignment up). I have to keep the bits that need to be warm warm and the bits that need to be cold cold. I have to get the autoguider setup and working.

Sunset here is 2122 and sunrise 0444 and it is not even remotely dark until well after sunset and plainly bright by 0300. Worse for you.

I too am not inclined to cart a literal shed load of stuff out on the off chance it'll be clear. I've made a step against that by buying one of these https://www.firstlightoptics.com/az-goto/skywatcher-skymax-127-synscan-az-goto.html . It is not as good as the main outfit but it does mean despite the awful skies in the unlikely event it is clear I am actually out seeing stuff.

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Message 96048 - Posted: 23 Jun 2016 | 14:13:44 UTC - in response to Message 96040.

Will write more when I get home. I don't often do much visual, and am primarily into imaging. For deep sky that is DSLR based as I never quite justified to myself going for a dedicated cooled sensor, and I'd have to upgrade everything else at the same time to match.

I do have the NEQ6 too, on fixed pier. The idea was I'd get the polar alignment done really well once, and leave it. That never happened... I did a rough alignment which was good enough, then knocked that out and never got around to readjusting it. I've probably done less than 3 nights of deep sky in the last two years.

I'll have to show a pic of my "laptop stand" when I get home :)

Oh, as for darkness, did you say you were in London? I'm on same latitude if so, and would expect similar (lack of) darkness in the summer months.

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Message 96050 - Posted: 23 Jun 2016 | 14:18:33 UTC - in response to Message 96040.
Last modified: 23 Jun 2016 | 14:19:15 UTC


These days it takes a considerable time to drag at least 100kg of kit including one or two computers out. I have to set it all up and align (although one of these http://www.qhyccd.com/PoleMaster.html has speeded alignment up). I have to keep the bits that need to be warm warm and the bits that need to be cold cold. I have to get the autoguider setup and working.

One means to bypassing this madness is to have a permanently aligned mount outside which is very well protected from the elements. All that remains thereafter is to mount the scope and get going. This is what I have done.

Right now I have less than six hours of darkness. :-(

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Message 96052 - Posted: 23 Jun 2016 | 14:31:27 UTC - in response to Message 96048.



Oh, as for darkness, did you say you were in London? I'm on same latitude if so, and would expect similar (lack of) darkness in the summer months.



I am at 51deg 25sec N. I had for some reason thought you were further north.

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Message 96055 - Posted: 23 Jun 2016 | 16:11:48 UTC

does an iPhone 6se count

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Message 96056 - Posted: 23 Jun 2016 | 16:15:38 UTC - in response to Message 96052.

Just fired up the GPS and I'm currently (at work) 51deg 32.3 N so technically I am slightly more north. I was up north a bit earlier this year on work travels, including when I took the Mercury transit pics and collecting the modified PST.

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Message 96060 - Posted: 23 Jun 2016 | 16:26:21 UTC - in response to Message 96055.

does an iPhone 6se count



For what?

Having an extra bumhole? Yes.

For being a scientist? May be. I shall make a post about how you can detect cosmic rays using it later. Brink knows one way.

For being cool. Nope.

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Message 96061 - Posted: 23 Jun 2016 | 16:37:48 UTC - in response to Message 96060.

does an iPhone 6se count



For what?

For being cool. Nope.


bummer as I am the coolest

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Message 96064 - Posted: 23 Jun 2016 | 16:41:54 UTC - in response to Message 96061.
Last modified: 23 Jun 2016 | 16:42:13 UTC

does an iPhone 6se count



For what?

For being cool. Nope.


bummer as I am the coolest

Bet ya gotta a really "cool" case for it too...


____________
There's someone in our head but it's not us.

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Message 96065 - Posted: 23 Jun 2016 | 16:42:54 UTC

I thought it would be amusing to take a picture of a cosmic ray. I read about the idea somewhere but now can not recall where. I don't claim it as original.

Cosmic rays are usually fast moving protons.

Droves of them come charging (pardon the pun) in and interact with atoms in the upper atmosphere.

The result of the collision is a beast called a pi meson which lives for a few nanoseconds. It then turns into a muon which is heavy, 200x the mass of an electron, charged with the same or exactly opposite charge of an electron, long lived at a couple of microseconds and going like stink. There are a fair few of these chaps around. At first sight you'd think that if they only live for 2 microseconds and they are formed high in the atmosphere then even if they are going at the speed of light then they won't go more than a couple of hundred metres but that forgets the time dilation of fast moving objects as predicted by Einstein. They go a fair bit further than that before they decay into an electron or a positron and two neutrinos.

So we have lots of big, fast moving and thus high energy particles with an electrical charge. That means they will eventually interact with other materials such as for example a camera sensor. There is a decent probability that one will interact with a camera sensor in an exposure of a couple of minutes.

I put the body cap on my camera (I could have left the lens on but didn't) engaged long noise exposure reduction and took several several minute exposures. Careful review of the results often but not always showed tracks like these (shown here in negative). They could be mere artifacts or the result of radioactive decay but the very strong probability is that They Came From Outer Space.




Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96066 - Posted: 23 Jun 2016 | 16:56:05 UTC - in response to Message 96065.

I thought it would be amusing to take a picture of a cosmic ray.

Cosmic ray hits are VERY common for those doing CCD work. They show up rather often as squiggly lines and are removed during processing using an STD rejection.

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Joined: 7 Jul 08
Posts: 2235
ID: 25193
Credit: 524,595,195
RAC: 112,998
321 LLR Jade: Earned 10,000,000 credits (10,043,076)Cullen LLR Jade: Earned 10,000,000 credits (10,256,286)ESP LLR Jade: Earned 10,000,000 credits (10,075,118)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,184,133)PPS LLR Emerald: Earned 50,000,000 credits (54,952,284)PSP LLR Jade: Earned 10,000,000 credits (10,037,823)SoB LLR Jade: Earned 10,000,000 credits (10,053,795)SR5 LLR Sapphire: Earned 20,000,000 credits (20,710,959)SGS LLR Jade: Earned 10,000,000 credits (10,026,927)TRP LLR Jade: Earned 10,000,000 credits (14,204,693)Woodall LLR Jade: Earned 10,000,000 credits (14,069,695)321 Sieve Silver: Earned 100,000 credits (200,220)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,710,149)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,184)PPS Sieve Emerald: Earned 50,000,000 credits (57,182,910)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,251,279)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (3,572,416)AP 26/27 Gold: Earned 500,000 credits (543,507)GFN Sapphire: Earned 20,000,000 credits (21,199,917)PSA Double Silver: Earned 200,000,000 credits (248,258,813)
Message 96068 - Posted: 23 Jun 2016 | 16:59:13 UTC

So the long years of wearing tinfoil hats were without purpose ...

TheDawgz gotta go blog about this important news.

As a matter of course we will be certain to credit your work on this very controversial subject.


____________
There's someone in our head but it's not us.

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96070 - Posted: 23 Jun 2016 | 17:01:59 UTC - in response to Message 96068.

So the long years of wearing tinfoil hats were without purpose ...

TheDawgz gotta go blog about this important news.

As a matter of course we will be certain to credit your work on this very controversial subject.




I am very sure it is important that you keep wearing the tinfoil hats.

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96071 - Posted: 23 Jun 2016 | 17:04:01 UTC

Oh and Rick.

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96072 - Posted: 23 Jun 2016 | 17:10:08 UTC

Obviously about Rick.

I thought everyone knew that.

Then TheDawgz posted and I thought we knew about that too.

TRR

PS

Anyone seen Z-san?

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96073 - Posted: 23 Jun 2016 | 17:18:11 UTC - in response to Message 96072.

Anyone seen Z-san?

The one-man wrecking crew is busy .... piling up millions. I admire him!!!

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96075 - Posted: 23 Jun 2016 | 17:33:32 UTC - in response to Message 96073.
Last modified: 23 Jun 2016 | 17:35:04 UTC

Anyone seen Z-san?

The one-man wrecking crew is busy .... piling up millions. I admire him!!!



He is The Steely Eyed Missile Man. I just worry that I included him in the same post as one mentioning Rick and TheDawgz. Oh and you now you mention it.

mackerelProject donor
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Joined: 2 Oct 08
Posts: 2208
ID: 29980
Credit: 334,227,088
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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96079 - Posted: 23 Jun 2016 | 18:52:19 UTC

My "laptop stand" :)

https://lh5.googleusercontent.com/-z0A-wMKCFlg/T23wsmKdzmI/AAAAAAAAHtY/0pSnKorzMog/s800/sunsetup.jpg

Very old pic, before I got planetary sensors and the EQ6... I'm still using that laptop stand.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96081 - Posted: 23 Jun 2016 | 19:30:07 UTC - in response to Message 96079.
Last modified: 23 Jun 2016 | 19:34:41 UTC

My "laptop stand" :)

https://lh5.googleusercontent.com/-z0A-wMKCFlg/T23wsmKdzmI/AAAAAAAAHtY/0pSnKorzMog/s800/sunsetup.jpg

Very old pic, before I got planetary sensors and the EQ6... I'm still using that laptop stand.

Now this is both funny and creative! LOL.

Edit: Here are my toys: http://www.perseus.gr/Astro-Equipment.htm ... bottom part of the page needs serious updating.

Edit: I also have to add a more recent acquisition: an Astro-Physics 130/f6.3 Gran Tourismo apochromatic refractor and for which I was on the waiting list for over NINE years. Telescopes from AP are that much in demand and not to mention the existence of a serious and active black market.

Profile Rick Reynolds
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Joined: 13 Aug 10
Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 96086 - Posted: 23 Jun 2016 | 20:52:26 UTC
Last modified: 23 Jun 2016 | 20:53:07 UTC

@TheFurryOne - of course my case is very cool - it's red

@RR - for yours and TheFurryOne's information, my hat is lead lined not tin foil (note my pic)

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Joined: 13 Aug 10
Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 96088 - Posted: 23 Jun 2016 | 20:54:24 UTC - in response to Message 96081.

My "laptop stand" :)

https://lh5.googleusercontent.com/-z0A-wMKCFlg/T23wsmKdzmI/AAAAAAAAHtY/0pSnKorzMog/s800/sunsetup.jpg

Very old pic, before I got planetary sensors and the EQ6... I'm still using that laptop stand.

Now this is both funny and creative! LOL.

Edit: Here are my toys: http://www.perseus.gr/Astro-Equipment.htm ... bottom part of the page needs serious updating.

Edit: I also have to add a more recent acquisition: an Astro-Physics 130/f6.3 Gran Tourismo apochromatic refractor and for which I was on the waiting list for over NINE years. Telescopes from AP are that much in demand and not to mention the existence of a serious and active black market.


that's some serious equipment

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Joined: 13 Aug 10
Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 96089 - Posted: 23 Jun 2016 | 20:56:43 UTC - in response to Message 96065.

I put the body cap on my camera


hmmm no wonder the pictures look that way

Profile Gary Craig
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Joined: 30 Dec 09
Posts: 3165
ID: 52890
Credit: 929,719,809
RAC: 1,214,733
Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,553,247)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (207,527)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,606,518)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,381,265)GFN Double Bronze: Earned 100,000,000 credits (175,905,284)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 96094 - Posted: 23 Jun 2016 | 22:42:52 UTC

I'm pretty sure TheDawgz are well shielded from solar/cosmic radiation by remaining under the porch. :-) If only it were cooler.

At one point I read (and this could be urban legend) that a coast-to-coast (USA) round-trip at normal aircraft altitude was the equivalent of getting a full chest x-ray at a hospital. And I worked with people that did this every few weeks. One more reason I'm glad I'm out (not that I traveled much for work).

Enjoying the glow from near sea level,

--Gary

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Joined: 7 Jul 08
Posts: 2235
ID: 25193
Credit: 524,595,195
RAC: 112,998
321 LLR Jade: Earned 10,000,000 credits (10,043,076)Cullen LLR Jade: Earned 10,000,000 credits (10,256,286)ESP LLR Jade: Earned 10,000,000 credits (10,075,118)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,184,133)PPS LLR Emerald: Earned 50,000,000 credits (54,952,284)PSP LLR Jade: Earned 10,000,000 credits (10,037,823)SoB LLR Jade: Earned 10,000,000 credits (10,053,795)SR5 LLR Sapphire: Earned 20,000,000 credits (20,710,959)SGS LLR Jade: Earned 10,000,000 credits (10,026,927)TRP LLR Jade: Earned 10,000,000 credits (14,204,693)Woodall LLR Jade: Earned 10,000,000 credits (14,069,695)321 Sieve Silver: Earned 100,000 credits (200,220)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,710,149)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,184)PPS Sieve Emerald: Earned 50,000,000 credits (57,182,910)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,251,279)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (3,572,416)AP 26/27 Gold: Earned 500,000 credits (543,507)GFN Sapphire: Earned 20,000,000 credits (21,199,917)PSA Double Silver: Earned 200,000,000 credits (248,258,813)
Message 96097 - Posted: 23 Jun 2016 | 23:06:59 UTC - in response to Message 96094.

I'm pretty sure TheDawgz are well shielded from solar/cosmic radiation by remaining under the porch. :-) If only it were cooler.
--Gary


It has been a bit warm; even under the porch.
For the first 22 days of June, we have seen ...
19 days that were > 100F (37.8C) of those 19 days,
7 days that were > 110F (43.3C) of those 7 days,
2 days that were > 115F (46.1) and of those 2 days
1 day which was exactly 120F (48.9C)

Phoenix is in for a long hot summer!
____________
There's someone in our head but it's not us.

Brook HarsteProject donor
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Joined: 30 Nov 08
Posts: 1335
ID: 32401
Credit: 799,672,545
RAC: 190,944
Discovered 2 mega primesFound 1 prime in the 2019 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,067,502)Cullen LLR Turquoise: Earned 5,000,000 credits (5,010,955)ESP LLR Turquoise: Earned 5,000,000 credits (7,439,418)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,501,906)PPS LLR Sapphire: Earned 20,000,000 credits (24,468,152)PSP LLR Turquoise: Earned 5,000,000 credits (5,667,951)SoB LLR Jade: Earned 10,000,000 credits (12,120,365)SR5 LLR Turquoise: Earned 5,000,000 credits (8,636,723)SGS LLR Turquoise: Earned 5,000,000 credits (5,201,403)TRP LLR Turquoise: Earned 5,000,000 credits (5,628,223)Woodall LLR Turquoise: Earned 5,000,000 credits (5,061,985)321 Sieve Amethyst: Earned 1,000,000 credits (1,027,534)Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (17,370,919)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,014,372)PPS Sieve Double Bronze: Earned 100,000,000 credits (129,430,775)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,083,315)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,629,248)AP 26/27 Emerald: Earned 50,000,000 credits (56,876,924)GFN Double Silver: Earned 200,000,000 credits (283,878,813)PSA Double Silver: Earned 200,000,000 credits (200,556,062)
Message 96099 - Posted: 23 Jun 2016 | 23:55:29 UTC - in response to Message 96097.

I'm pretty sure TheDawgz are well shielded from solar/cosmic radiation by remaining under the porch. :-) If only it were cooler.
--Gary


It has been a bit warm; even under the porch.
For the first 22 days of June, we have seen ...
19 days that were > 100F (37.8C) of those 19 days,
7 days that were > 110F (43.3C) of those 7 days,
2 days that were > 115F (46.1) and of those 2 days
1 day which was exactly 120F (48.9C)

Phoenix is in for a long hot summer!

120! Is that a record?
Right now it is 73 F in Mpls
____________

Profile Gary Craig
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Joined: 30 Dec 09
Posts: 3165
ID: 52890
Credit: 929,719,809
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Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,553,247)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (207,527)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,606,518)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,381,265)GFN Double Bronze: Earned 100,000,000 credits (175,905,284)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 96100 - Posted: 24 Jun 2016 | 0:27:32 UTC - in response to Message 96099.

A quick web search shows the all-time high temperature in Phoenix as 122F.

When I was there in a January about 10 years ago, it was the coldest day there in years. Ice on the streets and sidewalks. Bad for running.

--Gary

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96495 - Posted: 1 Jul 2016 | 11:36:22 UTC

Here is a picture of 2 telescopes. For scale the blue object in the case is credit card sized.

The black telescope has a notional aperture of 127mm and a focal length of 1500mm. It weighs a couple of kilograms. It is easy to carry with one hand

The white telescope has a notional aperture of 132mm and a focal length of 925mm. It weighs about 10kg. It is bulk and weight mean that two hands are needed to pick it up and for mounting it on a tripod prefarbly two people.

Images from the black telescope will be a somewhat fainter and rather larger than those from the white telescope. The black telescope is made by a well-reputed company and is widely regarded as good instrument. The cost of the black telescope complete with eyepieces, a computer controlled mount and tripod is almost exactly 10% of the price of the bare white tube.

The black telescope is very good for visual use and would likely be better than the white one for taking pictures of planets. For taking pictures of galaxies and star clusters the white telescope wins hands down.

Profile Rick Reynolds
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Joined: 13 Aug 10
Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 96500 - Posted: 1 Jul 2016 | 13:20:49 UTC

The boys and their toys

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 96501 - Posted: 1 Jul 2016 | 13:35:22 UTC - in response to Message 96500.

The boys and their toys



I just like bragging that I have got a 5 incher.

Profile Rick Reynolds
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Joined: 13 Aug 10
Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 96502 - Posted: 1 Jul 2016 | 13:58:51 UTC - in response to Message 96501.

The boys and their toys



I just like bragging that I have got a 5 incher.


It's not the length it's the girth

mackerelProject donor
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Joined: 2 Oct 08
Posts: 2208
ID: 29980
Credit: 334,227,088
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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96503 - Posted: 1 Jul 2016 | 14:08:32 UTC - in response to Message 96495.



Here's my main astro kit. I forgot the credit card sized object for scale but the gold tube on the left middle scope is roughly comparable to the short side of the credit card.

While at it, that left middle one is a Coronado Personal Solar Telescope, simply called PST for short. It doesn't need to be big as the sun is pretty bright, and this is the lowest cost route to a type of solar viewing that looks at a specific hydrogen emission. This is nominally 40mm aperture, 400mm focal length. Note the eyepiece holder has been temporarily taken off.

However the law of physics say, if you want more detail, you need to go large. That's what the long one at the bottom is for. I picked up a used PST and got the front part replaced with a Tal 100 RS. So 100mm aperture, 1000mm focal length. It should produce about 2.5x the resolution of the standard one. The blue box on the end is an astro-imaging camera, but you could equally put an eyepiece there and have a look.

Top right is my planetary scope. 200mm aperture, 2000mm focal length. Got this used, and it is really ancient but still works. Only annoyance is I never quite dialled in the collimation even upgrading it with a set of Bob's knobs, so I don't think it is giving as much detail as it could.

And finally, top left is actually a camera lens, but I use it for deep sky imaging. It is nominally 300mm focal length, f/2.8, but if you do the sums that should be 107mm aperture. It has a 105mm filter thread on it, so there is a bit of rounding going on somewhere.


Now... if only I had time to use any of it...

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96504 - Posted: 1 Jul 2016 | 14:38:29 UTC - in response to Message 96503.
Last modified: 1 Jul 2016 | 14:39:45 UTC

Gents,

Great pics. Always nice to see equipment photos.

I am waiting for a Celestron 14" EdgeHD to be shipped from California. Once it arrives, I will post some pics.

If the weather holds Saturday evening, I will be off to Mount Helmos 90 minutes west of Athens and near the facilities of the Aristarchus telescope at 2300+ meters altitude. With New Moon approaching, this is an opportunity for some widefield imaging under very dark skies (mag 7).

Edit: http://www.celestron.com/browse-shop/astronomy/optical-tubes/edgehd-14-optical-tube-assembly

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96698 - Posted: 8 Jul 2016 | 14:46:38 UTC - in response to Message 96504.
Last modified: 8 Jul 2016 | 14:48:42 UTC

The frankish Tower of Oinoe at Marathon, Greece and which is dated circa 1250 AD: http://www.perseus.gr/Astro-Star-Trails-Tower-Marathon-Oinoe-2016.htm.

Total exposure time is 5.5 hrs.

Edit: Britain has some incredible castles begging for such work!

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96740 - Posted: 10 Jul 2016 | 18:05:05 UTC

Aghia Foteini, Ancient Mantineia, Greece

A very controversial church constructed in the early 1970's where the architect sought to combine elements from the time of ancient Greece, the Byzantium and the modern era. This most unorthodox orthodox place of worship even had the Church of Greece express its dissatisfaction.

Further details at http://www.perseus.gr/Astro-Star-Trails-Ancient-Mantineia-Aghia-Foteini-2016.htm.

Profile Crun-chiProject donor
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Joined: 25 Nov 09
Posts: 2785
ID: 50683
Credit: 52,558,486
RAC: 1,878
Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Ruby: Earned 2,000,000 credits (2,982,840)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,073,792)TRP LLR Silver: Earned 100,000 credits (122,712)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,343,583)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,575,874)GFN Sapphire: Earned 20,000,000 credits (23,247,434)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 96954 - Posted: 19 Jul 2016 | 8:46:46 UTC - in response to Message 96740.

It is not good as your pictures,but I am trying :)






____________
271643232^131072+1 GENERALIZED FERMAT :)
93*10^1029523-1 REPDIGIT PRIME
31*332^367560+1 CRUS PRIME
Proud member of team Aggie The Pew. Go Aggie!

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96955 - Posted: 19 Jul 2016 | 8:52:34 UTC - in response to Message 96698.

The frankish Tower of Oinoe at Marathon, Greece and which is dated circa 1250 AD: http://www.perseus.gr/Astro-Star-Trails-Tower-Marathon-Oinoe-2016.htm.

Total exposure time is 5.5 hrs.

Edit: Britain has some incredible castles begging for such work!

NASA AstroPhoto of the Day honours over the weekend: http://apod.nasa.gov/apod/ap160716.html.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96956 - Posted: 19 Jul 2016 | 8:54:18 UTC - in response to Message 96954.

It is not good as your pictures,but I am trying :)

Very respectable efforts. The moon is awfully bright and with tremendous dynamic range whereas planets require a very steady atmosphere and good focal length.

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Joined: 2 Oct 08
Posts: 2208
ID: 29980
Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96957 - Posted: 19 Jul 2016 | 9:17:26 UTC

Crun-chi, nice efforts there. Just be careful on the moon not to blow out the highlights, especially the two bright spots to the right (anyone know their name?). What did you use for Jupiter? That looks comparable in visual quality to my efforts with 8" SCT, but I think I could in theory get better for the size.

Also congrats Anthony, well deserved. I used to hang out on some other astro-imaging forums and it was APODs everywhere there... I never tried myself though.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 96959 - Posted: 19 Jul 2016 | 10:14:41 UTC - in response to Message 96957.

Mack,

I know the surface of the moon quite well. Which two features are you referring two?

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Posts: 2785
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Credit: 52,558,486
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Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Ruby: Earned 2,000,000 credits (2,982,840)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,073,792)TRP LLR Silver: Earned 100,000 credits (122,712)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,343,583)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,575,874)GFN Sapphire: Earned 20,000,000 credits (23,247,434)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 96962 - Posted: 19 Jul 2016 | 10:55:52 UTC - in response to Message 96957.

Crun-chi, nice efforts there. Just be careful on the moon not to blow out the highlights, especially the two bright spots to the right (anyone know their name?). What did you use for Jupiter? That looks comparable in visual quality to my efforts with 8" SCT, but I think I could in theory get better for the size.

Also congrats Anthony, well deserved. I used to hang out on some other astro-imaging forums and it was APODs everywhere there... I never tried myself though.


There was two try`s with Jupiter: first was using 18 MP photo ( many of them) then stacking together ,and second was made by using HD movie on camera, and then stacking again..
This is still very first trys so I am on good way.
I just try to make photo of M42 and M14, but I must process them....

____________
271643232^131072+1 GENERALIZED FERMAT :)
93*10^1029523-1 REPDIGIT PRIME
31*332^367560+1 CRUS PRIME
Proud member of team Aggie The Pew. Go Aggie!

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Joined: 25 Nov 09
Posts: 2785
ID: 50683
Credit: 52,558,486
RAC: 1,878
Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Ruby: Earned 2,000,000 credits (2,982,840)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,073,792)TRP LLR Silver: Earned 100,000 credits (122,712)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,343,583)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,575,874)GFN Sapphire: Earned 20,000,000 credits (23,247,434)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 96963 - Posted: 19 Jul 2016 | 10:57:43 UTC - in response to Message 96956.

It is not good as your pictures,but I am trying :)

Very respectable efforts. The moon is awfully bright and with tremendous dynamic range whereas planets require a very steady atmosphere and good focal length.

Thanks for nice words!
Moon, when is old only few days is the best for making photo ( in my opinion)
____________
271643232^131072+1 GENERALIZED FERMAT :)
93*10^1029523-1 REPDIGIT PRIME
31*332^367560+1 CRUS PRIME
Proud member of team Aggie The Pew. Go Aggie!

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Joined: 2 Oct 08
Posts: 2208
ID: 29980
Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96968 - Posted: 19 Jul 2016 | 12:05:45 UTC - in response to Message 96959.

Mack,

I know the surface of the moon quite well. Which two features are you referring two?


In Crun-chi's pic, it is to the right of the image. There's two bright spots there that often catches me out but it was kept in control in that image. The 2nd image doesn't quite show that area but is just below and there are signs of blowing.

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Joined: 2 Oct 08
Posts: 2208
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Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96969 - Posted: 19 Jul 2016 | 12:07:09 UTC - in response to Message 96962.

There was two try`s with Jupiter: first was using 18 MP photo ( many of them) then stacking together ,and second was made by using HD movie on camera, and then stacking again..

I was actually more interested in the optics than the camera :) Air conditions and optics seem to be the bigger limiting factors.

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Joined: 25 Nov 09
Posts: 2785
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Credit: 52,558,486
RAC: 1,878
Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Ruby: Earned 2,000,000 credits (2,982,840)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,073,792)TRP LLR Silver: Earned 100,000 credits (122,712)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,343,583)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,575,874)GFN Sapphire: Earned 20,000,000 credits (23,247,434)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 96975 - Posted: 19 Jul 2016 | 16:18:14 UTC - in response to Message 96969.

There was two try`s with Jupiter: first was using 18 MP photo ( many of them) then stacking together ,and second was made by using HD movie on camera, and then stacking again..

I was actually more interested in the optics than the camera :) Air conditions and optics seem to be the bigger limiting factors.


I have basic telescope 115/900 reflector, two eyepiece and Barlow 2x lens...
and lot of time :)
Camera is Canon 1100D
____________
271643232^131072+1 GENERALIZED FERMAT :)
93*10^1029523-1 REPDIGIT PRIME
31*332^367560+1 CRUS PRIME
Proud member of team Aggie The Pew. Go Aggie!

mackerelProject donor
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Joined: 2 Oct 08
Posts: 2208
ID: 29980
Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 96977 - Posted: 19 Jul 2016 | 18:04:08 UTC - in response to Message 96975.

Wow... I never managed anything planetary that good with a DSLR. I went the dedicated planetary cam route in the end (glorified webcam).

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 98499 - Posted: 4 Sep 2016 | 0:58:05 UTC

There was a gorgeous conjunction this evening involving the very young crescent Moon with Venus and Jupiter.

Here is a sample peek: http://www.perseus.gr/Astro-Conjunctions-20160903.htm

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103062 - Posted: 5 Jan 2017 | 7:54:52 UTC

We have an interesting dilemma for those living in the northern hemisphere and where Earth's closest approach to the Sun (aka perihelion) occurs in the heart of winter.

Here is a comparison of mine between perihelion and aphelion from twelve yrs ago: http://www.perseus.gr/Astro-Solar-Scenes-Aph-Perihelion.htm.

The effect involving the Moon as it orbits Earth is even more dramatic and easily discernible to the experienced eye: http://www.perseus.gr/Astro-Lunar-Scenes-Apo-Perigee.htm.

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Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 103066 - Posted: 5 Jan 2017 | 9:01:19 UTC - in response to Message 103062.

I saw a similar (not the same spacing) conjunction of the moon and planet as I was driving home after the new year. No camera on me though.

I haven't consciously noticed variation in apparent sun size, but did with the moon. In my early days I was using a Mak on DSLR, and by chance the combination of sensor size and focal length meant that depending on how far the moon was at the time, it may or may not be taken in one shot.

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Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103070 - Posted: 5 Jan 2017 | 10:07:19 UTC - in response to Message 103066.

The variation in the apparent diameter of the Sun is virtually impossible to notice naked eye (with a filter) or through an eyepiece.

I like your comment about the Moon and how your effective focal length can make or break your ability to get the whole disk.

Lord Of The Rats
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Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 103114 - Posted: 5 Jan 2017 | 18:05:05 UTC

Here is a picture of the moon I took a few minutes ago

Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Turquoise: Earned 5,000,000 credits (6,176,751)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,221,148)SR5 LLR Turquoise: Earned 5,000,000 credits (8,293,415)SGS LLR Ruby: Earned 2,000,000 credits (2,012,222)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (5,046,112)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,098,088)GFN Emerald: Earned 50,000,000 credits (65,591,694)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 103161 - Posted: 6 Jan 2017 | 2:16:24 UTC - in response to Message 103066.

I saw a similar (not the same spacing) conjunction of the moon and planet as I was driving home after the new year. No camera on me though.


That was probably Venus. The moon and Venus were very close together in the sky on New Year's day, and Venus was exceptionally bright. Mars was also visible, but a bit further away and a lot dimmer.
____________
Please do not PM me with support questions. Ask on the forums instead. Thank you!

My lucky number is 75898524288+1

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103168 - Posted: 6 Jan 2017 | 9:59:32 UTC - in response to Message 103161.

Have any of you observed Venus during the day? You would be very surprised at how easy Venus is to see naked eye provided your eyes focus properly for infinity and you know where to look.

Once every few years we have Venus and the Moon being very close to each other during the day and this will help one realize how bright and visible Venus can be in broad daylight since one can use the Moon as a signpost to locate Venus in the immediate vicinity when such a conjunction does occur.

Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Turquoise: Earned 5,000,000 credits (6,176,751)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,221,148)SR5 LLR Turquoise: Earned 5,000,000 credits (8,293,415)SGS LLR Ruby: Earned 2,000,000 credits (2,012,222)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (5,046,112)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,098,088)GFN Emerald: Earned 50,000,000 credits (65,591,694)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 103169 - Posted: 6 Jan 2017 | 13:32:07 UTC - in response to Message 103168.

Have any of you observed Venus during the day? You would be very surprised at how easy Venus is to see naked eye provided your eyes focus properly for infinity and you know where to look.

Once every few years we have Venus and the Moon being very close to each other during the day and this will help one realize how bright and visible Venus can be in broad daylight since one can use the Moon as a signpost to locate Venus in the immediate vicinity when such a conjunction does occur.


I have not, but if I get a clear day I'll look. I have an iPhone app ("Skyview") that shows where every naked-eye visible celestial object is overlaid on the camera video, so finding it should be easy enough.
____________
Please do not PM me with support questions. Ask on the forums instead. Thank you!

My lucky number is 75898524288+1

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103170 - Posted: 6 Jan 2017 | 13:43:44 UTC - in response to Message 103169.

Have any of you observed Venus during the day? You would be very surprised at how easy Venus is to see naked eye provided your eyes focus properly for infinity and you know where to look.

Once every few years we have Venus and the Moon being very close to each other during the day and this will help one realize how bright and visible Venus can be in broad daylight since one can use the Moon as a signpost to locate Venus in the immediate vicinity when such a conjunction does occur.


I have not, but if I get a clear day I'll look. I have an iPhone app ("Skyview") that shows where every naked-eye visible celestial object is overlaid on the camera video, so finding it should be easy enough.

In this case it should be quite easy to spot with the help of your app. Simply give your eye a moment to properly adjust for true infinity. I am sure there is an evolutionary aspect to it but the eye treats anything around 400m or greater as "infinity" and which will obviously not work with the overhead sky.

You are in for a treat!

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 103173 - Posted: 6 Jan 2017 | 14:17:47 UTC - in response to Message 103169.

http://www.heavens-above.com/PlanetSummary.aspx?lat=40.7128&lng=-74.0059&loc=New+York&alt=10&tz=EST suggests that Venus, Mercury and Mars could be possible. Obviously be wary waving binoculars or telescopes around if the sun is up.

The early telescope studies on Mercury were mainly done in daylight since that was the only time it was high in the sky.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103176 - Posted: 6 Jan 2017 | 16:29:24 UTC - in response to Message 103173.

Tim, thanks for mentioning Mercury since this is something else I was meaning to bring up. It is amazing how few people including professional astronomers have seen Mercury naked eye.

I will check later to see when we have the next greatest elongation and which will allow for the naked eye observation of Mercury 30 minutes after sunset and for another 60-90 minutes thereafter.

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 103177 - Posted: 6 Jan 2017 | 16:41:40 UTC - in response to Message 103176.

Tim, thanks for mentioning Mercury since this is something else I was meaning to bring up. It is amazing how few people including professional astronomers have seen Mercury naked eye.

I will check later to see when we have the next greatest elongation and which will allow for the naked eye observation of Mercury 30 minutes after sunset and for another 60-90 minutes thereafter.



It is in the link; maximum western elongation is Jan 19 (ie mornings) and maximum east is April 1

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
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Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103187 - Posted: 6 Jan 2017 | 18:40:34 UTC - in response to Message 103177.

Tim, thanks for mentioning Mercury since this is something else I was meaning to bring up. It is amazing how few people including professional astronomers have seen Mercury naked eye.

I will check later to see when we have the next greatest elongation and which will allow for the naked eye observation of Mercury 30 minutes after sunset and for another 60-90 minutes thereafter.



It is in the link; maximum western elongation is Jan 19 (ie mornings) and maximum east is April 1

Around April 1st is the most convenient for many people due to it being evening. Here is an example from two years ago: http://www.perseus.gr/Astro-Planet-Mer-201405-Elong.htm.

As I mentioned earlier, seeing Mercury with the naked eye is a serious accomplishment and something which very few people can claim.

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Discovered 2 mega primesFound 1 prime in the 2019 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,067,502)Cullen LLR Turquoise: Earned 5,000,000 credits (5,010,955)ESP LLR Turquoise: Earned 5,000,000 credits (7,439,418)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,501,906)PPS LLR Sapphire: Earned 20,000,000 credits (24,468,152)PSP LLR Turquoise: Earned 5,000,000 credits (5,667,951)SoB LLR Jade: Earned 10,000,000 credits (12,120,365)SR5 LLR Turquoise: Earned 5,000,000 credits (8,636,723)SGS LLR Turquoise: Earned 5,000,000 credits (5,201,403)TRP LLR Turquoise: Earned 5,000,000 credits (5,628,223)Woodall LLR Turquoise: Earned 5,000,000 credits (5,061,985)321 Sieve Amethyst: Earned 1,000,000 credits (1,027,534)Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (17,370,919)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,014,372)PPS Sieve Double Bronze: Earned 100,000,000 credits (129,430,775)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,083,315)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,629,248)AP 26/27 Emerald: Earned 50,000,000 credits (56,876,924)GFN Double Silver: Earned 200,000,000 credits (283,878,813)PSA Double Silver: Earned 200,000,000 credits (200,556,062)
Message 103200 - Posted: 6 Jan 2017 | 20:27:16 UTC
Last modified: 6 Jan 2017 | 20:29:25 UTC

Ya'll got me to pull out my old Celestron Nexstar 4SE.
It's been such a long time that I have almost forgot how to use it. LOL
____________

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103203 - Posted: 6 Jan 2017 | 20:45:28 UTC - in response to Message 103200.

Ya'll got me to pull out my old Celestron Nexstar 4SE.
It's been such a long time that I have almost forgot how to use it. LOL

Good to see such an interest in astronomy in this group.

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 103204 - Posted: 6 Jan 2017 | 20:48:01 UTC - in response to Message 103200.

Ya'll got me to pull out my old Celestron Nexstar 4SE.
It's been such a long time that I have almost forgot how to use it. LOL


Enjoy; it is handy piece of kit.

Here is another lunar picture. The prominent valley through the mountains in the centre is called Vallis Alpes and is about 80 x 11 miles. To the picture left there is a crater called Cassini which has two craters within it. The smaller of those called Cassini B is 5 miles in diameter.

mackerelProject donor
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Joined: 2 Oct 08
Posts: 2208
ID: 29980
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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 103206 - Posted: 6 Jan 2017 | 21:15:39 UTC - in response to Message 103204.

http://snowporing.deviantart.com/art/Moon-20081206-105589857

To combine two things into one, at the above link is possibly my best detail shot of the whole moon ever (if partially illuminated), where those features can also be found at the top of the image. Hit the download button on right for a bigger version.

What optics did I use? A Nexstar 4SE :) That was before I tried stacking images so that's a mosaic of 5 shots from a DSLR.

Lord Of The Rats
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Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 103216 - Posted: 6 Jan 2017 | 21:47:55 UTC - in response to Message 103206.

Very nice. And it helped me locate another picture where my note taking let me down.

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Posts: 3165
ID: 52890
Credit: 929,719,809
RAC: 1,214,733
Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,553,247)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (207,527)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,606,518)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,381,265)GFN Double Bronze: Earned 100,000,000 credits (175,905,284)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 103217 - Posted: 6 Jan 2017 | 21:51:51 UTC

I've spotted Jupiter naked-eye in daylight when camping at altitude 9000' or so... nice clear, dry, air, and not so much of it to deal with. Mercury, a few times, but either pre-dawn or post-sunset.

skyandtelescope dot com has some free (no subscription needed) charts linked from their main page, for basic planetary observing, including Uranus and Neptune (no naked-eye on those, obviously).

Happy gazing,
--Gary

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103218 - Posted: 6 Jan 2017 | 21:56:06 UTC - in response to Message 103217.
Last modified: 6 Jan 2017 | 22:15:57 UTC

I've spotted Jupiter naked-eye in daylight when camping at altitude 9000' or so... nice clear, dry, air, and not so much of it to deal with.

This is impressive!

I caught the ISS transiting Jupiter during the day but I had trouble focusing due to a dim disk.

Edit: Here is the result: http://www.perseus.gr/Astro-Sat-ISS-2010-05-29.htm.

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Joined: 2 Oct 08
Posts: 2208
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Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 103222 - Posted: 6 Jan 2017 | 22:45:50 UTC



Another one with the Nexstar 4SE, this time hand held! It's the least worst shot I got of the ISS as it passed overhead.

I had to hand hold it since I had no other way to track it. Previous attempts with a camera lens didn't quite have enough reach.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 103225 - Posted: 6 Jan 2017 | 23:34:43 UTC - in response to Message 103222.
Last modified: 6 Jan 2017 | 23:34:59 UTC

This is a common strategy where the camera is shooting continuously and one manually tracks the ISS through the finderscope.

My mount allows for the automatic tracking of the ISS.

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Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Ruby: Earned 2,000,000 credits (2,982,840)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,073,792)TRP LLR Silver: Earned 100,000 credits (122,712)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,343,583)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,575,874)GFN Sapphire: Earned 20,000,000 credits (23,247,434)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 103235 - Posted: 7 Jan 2017 | 9:56:33 UTC - in response to Message 103218.

I've spotted Jupiter naked-eye in daylight when camping at altitude 9000' or so... nice clear, dry, air, and not so much of it to deal with.

This is impressive!

I caught the ISS transiting Jupiter during the day but I had trouble focusing due to a dim disk.

Edit: Here is the result: http://www.perseus.gr/Astro-Sat-ISS-2010-05-29.htm.


It looks like some alien ship :)
____________
271643232^131072+1 GENERALIZED FERMAT :)
93*10^1029523-1 REPDIGIT PRIME
31*332^367560+1 CRUS PRIME
Proud member of team Aggie The Pew. Go Aggie!

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Posts: 2208
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Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 104380 - Posted: 30 Jan 2017 | 23:48:34 UTC



I finally got around to doing more of the processing from the data a couple weeks back... enough to see something at least. Here's a "work in progress" of Orion nebula, with only minor adjustments so far. I did try more but I made it worse... too out of practice!

This was possibly my first time using the Canon 7D mk2 for astro. It is supposed to be one of the best sensors Canon made so far with regard to noise levels. Obviously not going to rival a cooled sensor which I'm still not going to pay for. Well... it wasn't perfect. For reasons unknown there was banding in my Orion shots if I really dig deep, but oddly none visible in the rosette shots.

81 subs of 30s each. Canon 7D mk2 + Sigma 120-300 OS at 300mm f/2.8, astronomik CLS-CCD filter. PixInsight + Photoshop.

Rosette will be a trickier process as there is a lot more red, which I find more difficult to handle. That reminds me, I never got around to downloading my Ha and OIII data on top of the RGB...

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 104381 - Posted: 31 Jan 2017 | 0:07:33 UTC - in response to Message 104380.

Very nice effort.

I have the Canon EOS 6D which I really like. It is also characterized with very low noise as well.

Since my primary interest for the 6D is astophotography, it has been modified with the addition of Baader's filter for enhanced h-alpha sensitivity while still very much usable for daytime photography with the proper custom white balance.

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Posts: 2208
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Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 104388 - Posted: 31 Jan 2017 | 9:02:07 UTC - in response to Message 104381.

I had a thought on my banding issue... I think as Orion is so bright, I used a different ISO setting than for Rosette which may be a contributing factor.

I did have a 450D full spectrum modified, but there was an unacceptable amount of dust so I'm now running it filterless. However the sensor is showing its age so I don't use it for astro any more. It is still my terrestrial NIR camera on the rare occasion I do that. I'm not actually sure where the camera is right now.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 104389 - Posted: 31 Jan 2017 | 9:07:11 UTC - in response to Message 104388.

I did have a 450D full spectrum modified, but there was an unacceptable amount of dust so I'm now running it filterless. However the sensor is showing its age so I don't use it for astro any more. It is still my terrestrial NIR camera on the rare occasion I do that. I'm not actually sure where the camera is right now.

NIR photography is something I have looked into as well and I hope to get into it one day. Ditto for UV.

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Joined: 2 Oct 08
Posts: 2208
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Credit: 334,227,088
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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 104391 - Posted: 31 Jan 2017 | 9:33:04 UTC - in response to Message 104389.

NIR is interesting and not too difficult to get into. I even tried it for astro although didn't get anything interesting. For stars it was interesting to see familiar constellations with different relative star brightness than used to, but I didn't investigate further. My vague hope was that going beyond 800-something nm would avoid another sodium emission wavelength, but sensitivity was so far down by then there wasn't much of anything.

UV I only indirectly tried, using the same filterless camera and the Baader Ca-K filter. This is not ideal, since it is somewhat narrowband but it was enough to show the patterns on flowers not visible normally.

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321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 104392 - Posted: 31 Jan 2017 | 9:34:04 UTC - in response to Message 104380.


81 subs of 30s each. Canon 7D mk2 + Sigma 120-300 OS at 300mm f/2.8, astronomik CLS-CCD filter. PixInsight + Photoshop..


How do you find PixInsight? I tried the free trial but it seemed horribly complicated tho' powerful. I use MaximDL and/or DSS and Photoshop at the moment.

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Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 104395 - Posted: 31 Jan 2017 | 9:54:14 UTC - in response to Message 104392.

How do you find PixInsight? I tried the free trial but it seemed horribly complicated tho' powerful. I use MaximDL and/or DSS and Photoshop at the moment.

There is a learning curve with it, and I've barely scratched its power. I've never had that good results with DSS, and have no experience with MaximDL.

My typical workflow is:
1 - integrate to create flat
2 - use flat to calibrate subs (I don't do darks or bias)
3 - register
4 - stack (good rejection options, typically use winsorised sigma clip + absolute clips to remove null data. My mount alignment is slightly off so I get free dithering which aids the rejection of hot pixels, as well as planes and satellites from the sigma clip)
5 - background gradient removal (a tricky one to do, auto just fails, semi-manual time consuming)
6 - stretch/levels/curves
7 - export to PS for more cosmetic tinkering

That probably isn't much different from other staking software. There are a lot of other functions I haven't really used. I think they want it to be a one stop package, although the finishing parts I still find easier to do in PS. At least it is buy once with lifetime updates.

The last image I posted was steps 1-4 above, skipped 5, minimal amounts of 6+7.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 104396 - Posted: 31 Jan 2017 | 10:25:11 UTC - in response to Message 104395.

PixInsight has a very steep learning curve. I was turned off a few years ago when the software would only work if you were connected to the internet (for verification purposes).

I religiously use CCDStack and a typical workflow includes the following:

(0) prepare master flat and master bias ... master dark from personal library

(1) calibration (master dark, master flat, master bias)
(2) bloom removal
(3) multi-point alignment
(4) FWHM normalization between subs using the best one as reference

(5) background normalization
(6) Sigma reject
(7) average combine
(8) steps (1) to (7) for each filter (ie. L, R, G, B) -> master Lum, master Red, master Green, master Blue

(9) Pinpoint astrometry (Maxim DL) using master Red
(10) Aladin + eXcalibrator -> to determine coefficients for G2V calibration
(11) using master Lum as reference, align master Red, master Green, master Blue
(12) deconvolution (Positive constraint) on master Lum (50 and 75 iterations)

(12.1) background normalization between master Red, master Green, master Blue

(13) use coefficients from (10) for RGB combine and/or LRGB for the two versions described in (12)
(14) non-linear stretch (DDP)
(15) onto Photoshop ... noise reduction using Neat Image
(16) use the two versions from (12) using a layer mask to correct for small artifacts from bright stars due to "75 iterations"
(17) small adjustments with levels, curves, saturation, colour balance
(18) pixel repair (due to nonlinear stretch)
(19) save onto disk as 16-bit TIFF
(20) save onto disk also as 8-bit TIFF -> slight processing when converting to JPEG due to light USM

Profile Evan
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Joined: 18 Jan 17
Posts: 31
ID: 484059
Credit: 11,041,578
RAC: 0
Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,171,478)PSP LLR Amethyst: Earned 1,000,000 credits (1,113,641)SoB LLR Turquoise: Earned 5,000,000 credits (6,011,108)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (73,721)TRP Sieve (suspended) Silver: Earned 100,000 credits (135,760)GFN Ruby: Earned 2,000,000 credits (2,535,869)
Message 104419 - Posted: 31 Jan 2017 | 22:07:46 UTC

These are some nice images. I used to use a online timeshare service for high end telescopes so I can produce data for the AAVSO. Did that for quite a few years actually. Nice to see some astroheads in the team!

Profile Greg
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Joined: 22 Dec 16
Posts: 67
ID: 477629
Credit: 2,800,017
RAC: 1,846
PPS LLR Amethyst: Earned 1,000,000 credits (1,169,908)SGS LLR Amethyst: Earned 1,000,000 credits (1,558,624)TRP Sieve (suspended) Bronze: Earned 10,000 credits (71,484)
Message 104958 - Posted: 12 Feb 2017 | 16:11:02 UTC - in response to Message 103222.



Another one with the Nexstar 4SE, this time hand held! It's the least worst shot I got of the ISS as it passed overhead.

I had to hand hold it since I had no other way to track it. Previous attempts with a camera lens didn't quite have enough reach.


That is VERY impressive work!! Bravo!!!!!

Profile Greg
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Joined: 22 Dec 16
Posts: 67
ID: 477629
Credit: 2,800,017
RAC: 1,846
PPS LLR Amethyst: Earned 1,000,000 credits (1,169,908)SGS LLR Amethyst: Earned 1,000,000 credits (1,558,624)TRP Sieve (suspended) Bronze: Earned 10,000 credits (71,484)
Message 104959 - Posted: 12 Feb 2017 | 16:14:16 UTC

This is the business end of one of the two systems I run at the New Forest Observatory.



The other observatory houses a C11 with Hyperstar III :)

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 104963 - Posted: 12 Feb 2017 | 17:57:06 UTC - in response to Message 104959.
Last modified: 12 Feb 2017 | 19:22:04 UTC

Greg, no coincidence you are using Canon 200mm lenses since exoplanet search teams use these lenses in an array as well in their all-sky surveys in both hemispheres.

Really good-looking set-up.

Iain BethuneProject donor
Honorary cruncher
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Joined: 28 Jan 09
Posts: 1588
ID: 34775
Credit: 194,056,043
RAC: 0
321 LLR Gold: Earned 500,000 credits (597,175)Cullen LLR Amethyst: Earned 1,000,000 credits (1,355,381)ESP LLR Turquoise: Earned 5,000,000 credits (5,048,594)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,564,412)PPS LLR Amethyst: Earned 1,000,000 credits (1,025,115)PSP LLR Sapphire: Earned 20,000,000 credits (28,367,849)SoB LLR Jade: Earned 10,000,000 credits (16,215,329)SR5 LLR Turquoise: Earned 5,000,000 credits (5,189,992)SGS LLR Amethyst: Earned 1,000,000 credits (1,244,067)TRP LLR Turquoise: Earned 5,000,000 credits (5,169,405)Woodall LLR Amethyst: Earned 1,000,000 credits (1,070,956)321 Sieve Bronze: Earned 10,000 credits (20,003)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,371)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (11,645,025)PPS Sieve Turquoise: Earned 5,000,000 credits (7,536,532)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,017,144)TRP Sieve (suspended) Gold: Earned 500,000 credits (554,946)AP 26/27 Ruby: Earned 2,000,000 credits (3,577,848)GFN Emerald: Earned 50,000,000 credits (97,047,976)PSA Ruby: Earned 2,000,000 credits (4,606,694)
Message 104980 - Posted: 13 Feb 2017 | 9:13:42 UTC - in response to Message 104959.

the New Forest Observatory.


Small world! We quite often holiday at the Holland's Wood campsite just outside Brockenhurst. Good dark skies, although not as good as Kielder Forest, which is just an hour down the road from home, or Galloway Forest park. On the plus side, I suspect there are a lot more clear nights.

- Iain
____________
Twitter: IainBethune
Proud member of team "Aggie The Pew". Go Aggie!
3073428256125*2^1290000-1 is Prime!

Profile Greg
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Joined: 22 Dec 16
Posts: 67
ID: 477629
Credit: 2,800,017
RAC: 1,846
PPS LLR Amethyst: Earned 1,000,000 credits (1,169,908)SGS LLR Amethyst: Earned 1,000,000 credits (1,558,624)TRP Sieve (suspended) Bronze: Earned 10,000 credits (71,484)
Message 104990 - Posted: 13 Feb 2017 | 12:41:46 UTC - in response to Message 104963.

Greg, no coincidence you are using Canon 200mm lenses since exoplanet search teams use these lenses in an array as well in their all-sky surveys in both hemispheres.

Really good-looking set-up.


Cheers Anthony - but I think the SuperWASP guys use the (not now available) f#1.8 lenses - way above my payscale - I have the very cheap f#2.8 lenses :)

Profile Greg
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Joined: 22 Dec 16
Posts: 67
ID: 477629
Credit: 2,800,017
RAC: 1,846
PPS LLR Amethyst: Earned 1,000,000 credits (1,169,908)SGS LLR Amethyst: Earned 1,000,000 credits (1,558,624)TRP Sieve (suspended) Bronze: Earned 10,000 credits (71,484)
Message 104991 - Posted: 13 Feb 2017 | 12:43:26 UTC - in response to Message 104980.

the New Forest Observatory.


Small world! We quite often holiday at the Holland's Wood campsite just outside Brockenhurst. Good dark skies, although not as good as Kielder Forest, which is just an hour down the road from home, or Galloway Forest park. On the plus side, I suspect there are a lot more clear nights.

- Iain


Not only a lot more clear nights - but also a lot more nights when you do actually get a night (and not just twilight) :)

mackerelProject donor
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Joined: 2 Oct 08
Posts: 2208
ID: 29980
Credit: 334,227,088
RAC: 182,666
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 105015 - Posted: 14 Feb 2017 | 0:02:37 UTC - in response to Message 104991.

Not only a lot more clear nights - but also a lot more nights when you do actually get a night (and not just twilight) :)

I seem to recall you have concerns about the changing nature of street lighting. How's that working for you?

I've noticed they started replacing "as needed" the old low pressure sodium ones with white LEDs around here, and they look pretty bright...

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 105068 - Posted: 16 Feb 2017 | 10:33:33 UTC - in response to Message 105015.

New toy arrived today. Photos of the monster to follow shortly.

Iain BethuneProject donor
Honorary cruncher
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Joined: 28 Jan 09
Posts: 1588
ID: 34775
Credit: 194,056,043
RAC: 0
321 LLR Gold: Earned 500,000 credits (597,175)Cullen LLR Amethyst: Earned 1,000,000 credits (1,355,381)ESP LLR Turquoise: Earned 5,000,000 credits (5,048,594)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,564,412)PPS LLR Amethyst: Earned 1,000,000 credits (1,025,115)PSP LLR Sapphire: Earned 20,000,000 credits (28,367,849)SoB LLR Jade: Earned 10,000,000 credits (16,215,329)SR5 LLR Turquoise: Earned 5,000,000 credits (5,189,992)SGS LLR Amethyst: Earned 1,000,000 credits (1,244,067)TRP LLR Turquoise: Earned 5,000,000 credits (5,169,405)Woodall LLR Amethyst: Earned 1,000,000 credits (1,070,956)321 Sieve Bronze: Earned 10,000 credits (20,003)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,371)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (11,645,025)PPS Sieve Turquoise: Earned 5,000,000 credits (7,536,532)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,017,144)TRP Sieve (suspended) Gold: Earned 500,000 credits (554,946)AP 26/27 Ruby: Earned 2,000,000 credits (3,577,848)GFN Emerald: Earned 50,000,000 credits (97,047,976)PSA Ruby: Earned 2,000,000 credits (4,606,694)
Message 105071 - Posted: 16 Feb 2017 | 14:00:38 UTC - in response to Message 105068.

Photos of the monster to follow shortly.


We prefer it if you'd keep them between you and your significant other ;)

____________
Twitter: IainBethune
Proud member of team "Aggie The Pew". Go Aggie!
3073428256125*2^1290000-1 is Prime!

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 105072 - Posted: 16 Feb 2017 | 14:06:07 UTC - in response to Message 105071.

Photos of the monster to follow shortly.


We prefer it if you'd keep them between you and your significant other ;)



I am one of the few people who brag of having a 132mm monster.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 105080 - Posted: 16 Feb 2017 | 18:18:54 UTC - in response to Message 105072.

Photos of the monster to follow shortly.


We prefer it if you'd keep them between you and your significant other ;)



I am one of the few people who brag of having a 132mm monster.

Just a little patience for the 254mm monster. I am waiting for clear blue skies.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 105081 - Posted: 16 Feb 2017 | 18:19:09 UTC - in response to Message 105071.

Photos of the monster to follow shortly.


We prefer it if you'd keep them between you and your significant other ;)

LOL!

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Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 105085 - Posted: 17 Feb 2017 | 0:11:06 UTC

So you have to use millimeters instead of inches. Sounds kinda small

Lord Of The Rats
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Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 105089 - Posted: 17 Feb 2017 | 2:56:30 UTC - in response to Message 105085.

So you have to use millimeters instead of inches. Sounds kinda small


It is the cold that does it.

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Joined: 22 Dec 16
Posts: 67
ID: 477629
Credit: 2,800,017
RAC: 1,846
PPS LLR Amethyst: Earned 1,000,000 credits (1,169,908)SGS LLR Amethyst: Earned 1,000,000 credits (1,558,624)TRP Sieve (suspended) Bronze: Earned 10,000 credits (71,484)
Message 105497 - Posted: 2 Mar 2017 | 9:04:17 UTC - in response to Message 105015.

Hi Mackerel - sorry only just seen your question.
Well the answer to the LEDs is "mixed bag".
The sky is MUCH darker now which means I can actually do meteor photography with the DSLR and no IDAS filter.
BUT - the overall skyglow has cost me (I would guess) about 2 magnitudes now that I am surrounded by LED lighting. I saw the skyglow getting slowly worse for about 3 or 4 years as the LEDs made their way towards me.
In other words - although the sky appears a lot darker to the eye with LED lighting - the IDAS filters cut out all the Sodium skyglow very efficiently, so although the sky was a sickly yellow/orange to the eye - with the IDAS filter in it was considerably "darker" than I have now with the LEDs.
But fortunately I can still do work from here.

Profile Gary Craig
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Joined: 30 Dec 09
Posts: 3165
ID: 52890
Credit: 929,719,809
RAC: 1,214,733
Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,553,247)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (207,527)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,606,518)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,381,265)GFN Double Bronze: Earned 100,000,000 credits (175,905,284)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 105842 - Posted: 9 Mar 2017 | 22:05:20 UTC

Canyonlands National Park, circa 1999; scan of a print. Sorry for the graininess.

Gary++

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 106064 - Posted: 15 Mar 2017 | 18:17:56 UTC

Greg, his fair lady and I shared the odd beverage today. And very pleasant it was too. In passing I mentioned some pictures I had taken of the ISS transiting the moon. They were shared here a couple of years ago but I think they bear republication

Profile Rick Reynolds
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Joined: 13 Aug 10
Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 106070 - Posted: 15 Mar 2017 | 20:12:37 UTC - in response to Message 106064.

Greg, his fair lady and I shared the odd beverage today. And very pleasant it was too.


And what was odd about it?

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 106072 - Posted: 15 Mar 2017 | 20:45:02 UTC - in response to Message 106070.
Last modified: 15 Mar 2017 | 20:49:45 UTC

Greg, his fair lady and I shared the odd beverage today. And very pleasant it was too.


And what was odd about it?



We each had a non zero (and integer number) of beverages. Some of us had an even number of beverages. Some of us had a prime number of beverages. The total number of beverages was prime and since there were three of us in total we had an odd number of beverages.

Profile Rick Reynolds
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Joined: 13 Aug 10
Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 106074 - Posted: 15 Mar 2017 | 20:59:57 UTC - in response to Message 106072.

Greg, his fair lady and I shared the odd beverage today. And very pleasant it was too.


And what was odd about it?



We each had a non zero (and integer number) of beverages. Some of us had an even number of beverages. Some of us had a prime number of beverages. The total number of beverages was prime and since there were three of us in total we had an odd number of beverages.


Greg had 3, his fair lady had 1 and you had 2

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 106080 - Posted: 15 Mar 2017 | 23:34:39 UTC - in response to Message 106074.

Greg, his fair lady and I shared the odd beverage today. And very pleasant it was too.


And what was odd about it?



We each had a non zero (and integer number) of beverages. Some of us had an even number of beverages. Some of us had a prime number of beverages. The total number of beverages was prime and since there were three of us in total we had an odd number of beverages.


Greg had 3, his fair lady had 1 and you had 2


Which would make 6.

And no the answer wasn't that he had 1, his missus 2 and I had 190.

Profile Rick Reynolds
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Joined: 13 Aug 10
Posts: 7125
ID: 65483
Credit: 3,987,388,845
RAC: 593,128
Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 106081 - Posted: 15 Mar 2017 | 23:39:58 UTC - in response to Message 106080.

Greg, his fair lady and I shared the odd beverage today. And very pleasant it was too.


And what was odd about it?



We each had a non zero (and integer number) of beverages. Some of us had an even number of beverages. Some of us had a prime number of beverages. The total number of beverages was prime and since there were three of us in total we had an odd number of beverages.


Greg had 3, his fair lady had 1 and you had 2


Which would make 6.

And no the answer wasn't that he had 1, his missus 2 and I had 190.


Yeah was thinking about that later and realized the total wasn't odd, just not correct.

Lord Of The Rats
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Joined: 2 Apr 16
Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 106084 - Posted: 16 Mar 2017 | 0:45:22 UTC - in response to Message 106081.
Last modified: 16 Mar 2017 | 6:09:45 UTC


Yeah was thinking about that later and realized the total wasn't odd, just not correct.


It is easy to do*. In fact two of us had a tea and a coffee and the third just a coffee.

*Edit. Easy to do in the sense of easy to make silly errors.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 106357 - Posted: 24 Mar 2017 | 11:31:56 UTC
Last modified: 24 Mar 2017 | 11:33:02 UTC

Tomorrow we have interior solar conjunction with Venus being less than 10 degrees away from the Sun while showing a gorgeous 1% crescent phase. I have pristine transparency right now and I will calibrate everything later today for a run at Venus tomorrow midday with my TEC Mak-Cas (5000mm focal length) and an IR Pass filter (850nm) to maximize contrast.

Profile Greg
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Joined: 22 Dec 16
Posts: 67
ID: 477629
Credit: 2,800,017
RAC: 1,846
PPS LLR Amethyst: Earned 1,000,000 credits (1,169,908)SGS LLR Amethyst: Earned 1,000,000 credits (1,558,624)TRP Sieve (suspended) Bronze: Earned 10,000 credits (71,484)
Message 106518 - Posted: 31 Mar 2017 | 8:46:15 UTC - in response to Message 106357.

Tomorrow we have interior solar conjunction with Venus being less than 10 degrees away from the Sun while showing a gorgeous 1% crescent phase. I have pristine transparency right now and I will calibrate everything later today for a run at Venus tomorrow midday with my TEC Mak-Cas (5000mm focal length) and an IR Pass filter (850nm) to maximize contrast.


Does an interior solar conjunction mean the Sun is this side of Venus? Sorry :)

Profile DaveProject donor
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Joined: 13 Feb 12
Posts: 2575
ID: 130544
Credit: 802,706,560
RAC: 291,251
Found 2 primes in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,008,573)Cullen LLR Turquoise: Earned 5,000,000 credits (5,005,909)ESP LLR Turquoise: Earned 5,000,000 credits (5,303,526)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,202,873)PPS LLR Turquoise: Earned 5,000,000 credits (5,461,508)PSP LLR Turquoise: Earned 5,000,000 credits (5,021,564)SoB LLR Turquoise: Earned 5,000,000 credits (8,851,996)SR5 LLR Turquoise: Earned 5,000,000 credits (5,000,482)SGS LLR Turquoise: Earned 5,000,000 credits (5,000,035)TRP LLR Ruby: Earned 2,000,000 credits (3,961,171)Woodall LLR Ruby: Earned 2,000,000 credits (3,007,050)321 Sieve Ruby: Earned 2,000,000 credits (2,435,881)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (268,250)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,502)PPS Sieve Double Silver: Earned 200,000,000 credits (300,002,145)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,133)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,970)AP 26/27 Double Bronze: Earned 100,000,000 credits (113,175,699)GFN Double Bronze: Earned 100,000,000 credits (100,000,025)PSA Double Silver: Earned 200,000,000 credits (200,000,001)
Message 106558 - Posted: 1 Apr 2017 | 21:03:33 UTC

Right now low southeast UK if you can see Jupiter all 4 Galileans are visible. I don't have the means to take a photo right now with my myriad of feable basic equipment but it is the first time I have seen all 4 at once.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 106559 - Posted: 1 Apr 2017 | 21:44:49 UTC - in response to Message 106558.

Eagerly waiting for night time temps to rise a little it. I have very low tolerance for anything below 16d C or so but I can easily handle heat waves.

Anthony Ayiomamitis
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Joined: 19 Mar 15
Posts: 2464
ID: 386066
Credit: 624,326,106
RAC: 399,265
Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 106560 - Posted: 1 Apr 2017 | 21:46:18 UTC - in response to Message 106518.

Tomorrow we have interior solar conjunction with Venus being less than 10 degrees away from the Sun while showing a gorgeous 1% crescent phase. I have pristine transparency right now and I will calibrate everything later today for a run at Venus tomorrow midday with my TEC Mak-Cas (5000mm focal length) and an IR Pass filter (850nm) to maximize contrast.


Does an interior solar conjunction mean the Sun is this side of Venus? Sorry :)

Greg of Borg,

Congrats on today's EPOD: http://epod.usra.edu/blog/2017/04/odd-structure-near-regulus.html.

Profile Gary Craig
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Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,553,247)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (207,527)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,606,518)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,381,265)GFN Double Bronze: Earned 100,000,000 credits (175,905,284)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 106577 - Posted: 2 Apr 2017 | 17:12:03 UTC

Jupiter is at opposition later this week, so maybe a good time for those of you with decent 'scopes to drag them out. (weather permitting, of course)
Jovially,
Gary++

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Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,553,247)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (207,527)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,606,518)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,381,265)GFN Double Bronze: Earned 100,000,000 credits (175,905,284)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 107326 - Posted: 26 Apr 2017 | 1:27:18 UTC
Last modified: 26 Apr 2017 | 1:27:43 UTC

http://www.diyphotography.net/nasa-makes-entire-media-library-publicly-accessible-copyright-free/

Gary++

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PPS LLR Amethyst: Earned 1,000,000 credits (1,169,908)SGS LLR Amethyst: Earned 1,000,000 credits (1,558,624)TRP Sieve (suspended) Bronze: Earned 10,000 credits (71,484)
Message 107390 - Posted: 27 Apr 2017 | 17:53:28 UTC - in response to Message 106560.

Thank you Anthony :)

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Message 107728 - Posted: 8 May 2017 | 9:51:46 UTC
Last modified: 8 May 2017 | 9:52:56 UTC

Last night there was a close encounter between Jupiter and a 12-day old Moon. This was the scene over the New Forest Observatories:

http://www.newforestobservatory.com/wordpress/wp-content/gallery/projects/Moon_Jupiter_Half.jpg



Greg
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Message 107729 - Posted: 8 May 2017 | 10:06:09 UTC - in response to Message 107728.

Very nice. I had hoped to have a go but hereabouts it has been overcast for a long time.

I am hoping to have a punt at Jupiter with a very long focal length later this week if the weather proves as promised.

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Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 107735 - Posted: 8 May 2017 | 11:55:36 UTC

Nice catch, Greg.

I had a look at the conjunction visually but did not bother to set up any equipment.

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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 107736 - Posted: 8 May 2017 | 11:56:53 UTC

Once again Greg inspires me, that I should stop being lazy and give Jupiter another go. Looks like closest point of the current orbit was about a month ago, but it is still pretty close which could help with the detail potential. Some day I might even properly collimate my scope... I don't think I'm getting the potential others have with the size class I'm using. No idea where any of my planetary imaging kit is which will be 1st hurdle.

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Message 107942 - Posted: 16 May 2017 | 10:54:29 UTC

It is rather obviously not from the Hubble telescope but here is a picture I took of Jupiter on Sunday

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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Turquoise: Earned 5,000,000 credits (6,176,751)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,221,148)SR5 LLR Turquoise: Earned 5,000,000 credits (8,293,415)SGS LLR Ruby: Earned 2,000,000 credits (2,012,222)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (5,046,112)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,098,088)GFN Emerald: Earned 50,000,000 credits (65,591,694)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 107950 - Posted: 16 May 2017 | 14:19:49 UTC - in response to Message 107942.

It is rather obviously not from the Hubble telescope but here is a picture I took of Jupiter on Sunday


Saturday night I was watching, on TV, a NASCAR race from Kansas. As is typical of NASCAR, there were a lot of crashes and the announcers had a lot of time to fill while the track was cleared of debris.

It was a particularly clear night out in the midwest U.S.

I have no idea what kind of lenses they have on their TV cameras, but they pointed one of them at Jupiter. You could clearly see Jupiter's disk in the TV picture. You couldn't see the colors or the bands because they were washed out. They seem to have had the aperture wide open in order to image something a lot dimmer. Jupiter was washed out -- but you could clearly see 3 of the 4 Galilean moons in the TV picture.

I had no idea you could do that with a TV camera.
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Message 107951 - Posted: 16 May 2017 | 14:33:18 UTC - in response to Message 107950.


Saturday night I was watching, on TV, a NASCAR race from Kansas. As is typical of NASCAR, there were a lot of crashes and the announcers had a lot of time to fill while the track was cleared of debris.

It was a particularly clear night out in the midwest U.S.

I have no idea what kind of lenses they have on their TV cameras, but they pointed one of them at Jupiter. You could clearly see Jupiter's disk in the TV picture. You couldn't see the colors or the bands because they were washed out. They seem to have had the aperture wide open in order to image something a lot dimmer. Jupiter was washed out -- but you could clearly see 3 of the 4 Galilean moons in the TV picture.

I had no idea you could do that with a TV camera.


My picture was taken with a 2000mm focal length telescope with 2x and 2.25x teleconverters on it using a Canon APS slr. Beforehand I had a look with a charity/thrift shop cheap pair of 8x21 binoculars and the Galilean satellites were all easily visible as were some Jovian cloud bands. I had intended to take a picture of the disc and satellites but they would not fit in the frame even without the teleconverters so I would have needed to swap telescopes.

Remember Galileo was using incredibly primitive kit. If you have not turned some kind of optical aid on Jupiter do so and re-live a key point in science. It is at the moment the big bright star south and east at dusk.

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Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (3,356,142)PPS LLR Jade: Earned 10,000,000 credits (17,250,548)PSP LLR Ruby: Earned 2,000,000 credits (2,084,850)SoB LLR Turquoise: Earned 5,000,000 credits (5,014,268)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,132,465)TRP LLR Turquoise: Earned 5,000,000 credits (6,568,836)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve Emerald: Earned 50,000,000 credits (57,067,861)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,046,555,461)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (121,362,774)GFN Double Bronze: Earned 100,000,000 credits (152,361,440)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 107953 - Posted: 16 May 2017 | 15:46:56 UTC

I must say that picture is really brilliant! Especially taken from the ground.

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Message 107956 - Posted: 16 May 2017 | 16:54:00 UTC - in response to Message 107950.

If the camera operator could have reduced the exposure it could have picked up detail. Jupiter is pretty bright so sensitivity isn't the problem, which is that as big as it is, it is still pretty far away and you need to throw some focal length at it.

I'd echo the suggestion of looking at the planets through a scope, not sure if binoculars would be sufficient. My smaller scope is only 4" and even with that, you can see bands on Jupiter, and the rings around Saturn. You might have seen great images on a screen before, but collecting those photons from the source to your eye is something else.

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Message 107957 - Posted: 16 May 2017 | 17:47:31 UTC - in response to Message 107956.
Last modified: 16 May 2017 | 17:51:47 UTC

The planets need VERY serious focal length. For example, here is Saturn at 3910mm (double Tim's focal length): http://www.perseus.gr/Astro-Planet-Sat-20041107.htm.

Although both software and hardware were nothing compared to today's options: here is Saturn with even more focal length (8000 mm): http://www.perseus.gr/Astro-Planet-Sat-20041107b.htm.

The adverse effects of atmospheric dispersion due to the low altitude of Saturn at the time are quite obvious in the blue channel as is always the case: .

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Message 107978 - Posted: 17 May 2017 | 18:56:37 UTC - in response to Message 107956.

...

I'd echo the suggestion of looking at the planets through a scope, not sure if binoculars would be sufficient. My smaller scope is only 4" and even with that, you can see bands on Jupiter, and the rings around Saturn. You might have seen great images on a screen before, but collecting those photons from the source to your eye is something else.



Hi Mackerel

As you say observing using even basic equipment is truly remarkable. You don't see anything like what you see in pictures from Hubble or even the pictures posted here.

The (4) moons of Jupiter are easily bright enough and often far enough from Jupiter to be seen without visual aid; the reason they are not easily visible is because of the glare from Jupiter. In my experience even a cheap pair of binoculars would easily show them as would a long focal length camera lens. I can see a couple of bands on Jupiter with 8 x 21 binoculars or with an 80mm telescope at 12x.




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Message 108100 - Posted: 23 May 2017 | 17:02:09 UTC

This photograph won't win any prizes at all but it might be interesting. It is of Jupiter on Saturday evening at around 2200GMT. (I'll explain why that might be relevant later.) It is a single frame of a video taken using a Canon SLR with an APS sensor (ie the small kind) and a 480mm f/6 lens. I don't recall the exposure or ASA.

Jupiter is the bright disc in the centre but you notice three small dots in a sloping line two to the left and one to the right of Jupiter. They are three of the four Galilean satellites of Jupiter. The fourth satellite was probably either out for dinner, in front of Jupiter or behind it.

If you could be bothered armed with the knowledge of when the picture was taken and that it is reversed left to right but upright you could if you wanted identify the satellites.

Jupiter and it's moons are within easy reach of simple equipment.



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Message 108101 - Posted: 23 May 2017 | 17:40:14 UTC - in response to Message 108100.

I had to give it a go... and I'm failing. The first place in Google was http://www.shallowsky.com/jupiter/ and putting Sat at 22:00, it doesn't match, even if I consider mirroring it. There is some ambiguity in the use of GMT, does that mean UTC, or BST? Still, shifting the prediction an hour either side doesn't match up either. Looking more, there is a 4th fainter dot further to the left, and down a bit so not on the same axis.

If we take the 4 dots, right to left as shown, and disregarding the comment on mirroring, it could fit 21:00 BST as follows:
Ganymede
Io
Unknown
Callisto

Europa is behind Jupiter.

I'm only guessing as to what the unknown dot might be. A stray reflection in the optics? A hot pixel on the sensor? Some other object photobombing?

Looking even more, I think I see an even fainter dot this time to the right. If that were Callisto, this would then be consistent with the left-right flip. Still going right to left as shown, with the 3 bright objects being Io, Ganymede, and unknown.

I think I'll stop here as I'm starting to see dots in front of my eyes. The more determined might try overlaying the prediction with the shot to work out what fits best.

I'm not sure there's enough for it to chew on, but there is even software that when fed with a sky image, it will work out what it is. http://astrometry.net/ (there used to be a flickr bot you could call up, but I haven't checked in on it recently)

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Message 108103 - Posted: 23 May 2017 | 18:56:36 UTC - in response to Message 108101.

I am afraid I sent you on a wild goose chase. The video was in fact taken shortly before 2200 BST 2100 GMT on 21 May. Left to right we have Callisto, Europa, Jupiter and Ganymede.

I edited the basic file to make it look a bit more like it did in the viewfinder although Callisto was much more prominent.

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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Turquoise: Earned 5,000,000 credits (6,176,751)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,221,148)SR5 LLR Turquoise: Earned 5,000,000 credits (8,293,415)SGS LLR Ruby: Earned 2,000,000 credits (2,012,222)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (5,046,112)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,098,088)GFN Emerald: Earned 50,000,000 credits (65,591,694)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 108104 - Posted: 23 May 2017 | 20:27:49 UTC

I used NASA's "Eyes on the Solar System" program. I set it 22:00 on the 21st, and, looking backwards (from Jupiter to the Sun), I get exactly the image you have, except mirrored vertically (which is what you would expect). The only difference is that IO is barely visible beyond Jupiter's disk in this image. Since you took the picture a bit before 22:00, IO would have been in behind Jupiter at that time, or at least so close to the disk that you wouldn't be able to discern it.
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Message 108106 - Posted: 23 May 2017 | 22:40:47 UTC

In response to a prior comment:
"GMT" and "UTC" are basically the same thing. There is also "UT1", which is UTC but does not include leapseconds. None are the same as "British Summer Time" (BST), which is artificially advanced 1 hour, just like "Daylight Savings Time" here in the states.
A fuller discussion for those interested:
https://en.wikipedia.org/wiki/Universal_Time
I used to contract-work on a government project where these nuances were *very* important.
Gary++

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Message 108107 - Posted: 23 May 2017 | 22:54:09 UTC - in response to Message 108106.

My questioning was on the basis that it is not uncommon for people to say GMT to mean the current time in the UK, even when it is BST. At least usage of UTC and BST are unambiguous, but there remains doubt in the general use of GMT for half of the year.

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Message 108119 - Posted: 25 May 2017 | 5:30:53 UTC - in response to Message 108107.

My questioning was on the basis that it is not uncommon for people to say GMT to mean the current time in the UK, even when it is BST. At least usage of UTC and BST are unambiguous, but there remains doubt in the general use of GMT for half of the year.


People use "GMT" when it should be BST?!?!?! I didn't know they were that ignorant.

Also GMT was abolished in ~1972. Old habits seem to die hard.

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Message 108121 - Posted: 25 May 2017 | 8:02:43 UTC - in response to Message 108119.

Not everyone needs to deal with multiple time zones for day to day life. My guess is that their usage of GMT is to refer to which band on the time zone map they are physically based in, more than the actual local time modifier.

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Message 108122 - Posted: 25 May 2017 | 8:47:46 UTC - in response to Message 108119.
Last modified: 25 May 2017 | 8:48:27 UTC

My questioning was on the basis that it is not uncommon for people to say GMT to mean the current time in the UK, even when it is BST. At least usage of UTC and BST are unambiguous, but there remains doubt in the general use of GMT for half of the year.


People use "GMT" when it should be BST?!?!?! I didn't know they were that ignorant.

Also GMT was abolished in ~1972. Old habits seem to die hard.


Are you sure GMT has been abolished? So far as I know section 9 of The Interpretation Act 1978 remains in force. https://en.wikipedia.org/wiki/Interpretation_Act_1978 . You can read it here http://www.legislation.gov.uk/ukpga/1978/30 . It defines time in the UK subject to two exceptions in terms of GMT.

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Message 108129 - Posted: 25 May 2017 | 12:58:16 UTC - in response to Message 108119.

Also GMT was abolished in ~1972. Old habits seem to die hard.


When I learned to fly (around 1990), I was taught to use UTC rather than GMT. Or "Zulu" on the radio. For what should be obvious reasons, aviation related activities work best when everyone's clock shows the same time.

The warning "severe thunderstorms expected at 3:00" isn't nearly as useful when you're not sure what "3:00" actually means. :)

____________
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Message 108133 - Posted: 25 May 2017 | 15:19:30 UTC

I notice my local photography store has a used Canon 200mm f/1.8L on offer for not much change from £2000. This has always been a "what if" lens for me. It isn't traditional for astrophotography to be performed at such "fast" speeds, mainly due to the difficulty of producing high quality optics, but also as it can interfere with filter performance. If you look up SuperWASP, they use not one but a whole bunch of these lenses to search for extra-solar planets, so it can't be that bad. With my favoured APS-C sensor size, this would still be quite wide field, and again the speed may cause my filters to not function as expected. On the rare occasion when I still bother going outside to get some data, I'm still using a Sigma 120-300mm f/2.8. Big, fast, and a zoom! But it produces results as good as I can reasonably expect in my environment.

For the price, I can't justify it to myself for astro use only. My other interest is wildlife, where it could be interesting in more controlled scenarios... but I don't do nearly enough of that either...

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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Turquoise: Earned 5,000,000 credits (6,176,751)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,221,148)SR5 LLR Turquoise: Earned 5,000,000 credits (8,293,415)SGS LLR Ruby: Earned 2,000,000 credits (2,012,222)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (5,046,112)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,098,088)GFN Emerald: Earned 50,000,000 credits (65,591,694)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 108135 - Posted: 25 May 2017 | 15:54:08 UTC - in response to Message 108133.

I notice my local photography store has a used Canon 200mm f/1.8L on offer... ...It isn't traditional for astrophotography to be performed at such "fast" speeds, mainly due to the difficulty of producing high quality optics, but also as it can interfere with filter performance.


Please enlighten me. Back in the day, I did own a Nikon 35mm (film) SLR, so I'm (barely) one step ahead of the "Instamatic" crowd. What is the problem with using filters with fast lenses?

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Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (48,102,772)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 108136 - Posted: 25 May 2017 | 18:17:56 UTC - in response to Message 108135.

High quality astro filters tend to work using interference methods, with multiple semi-reflective layers to tune the wavelengths blocked or passed. Because of this, they are fussy with the angle of the light, and ideally light would go through it perpendicularly. No problem, stick a filter on the front of the objective, as distant objects converge towards parallel light. The problem with this is cost. Generally, the front of optics are rather big, and price is roughly proportional to area. So everyone uses filters to the rear, between optics and sensor. Faster optics will tend to have a bigger spread of angle of light between optics and sensor. At an angle, your filter might not be doing what you thought it was.

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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Turquoise: Earned 5,000,000 credits (6,176,751)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,221,148)SR5 LLR Turquoise: Earned 5,000,000 credits (8,293,415)SGS LLR Ruby: Earned 2,000,000 credits (2,012,222)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (5,046,112)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,098,088)GFN Emerald: Earned 50,000,000 credits (65,591,694)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 108138 - Posted: 25 May 2017 | 19:08:25 UTC - in response to Message 108136.

High quality astro filters tend to work using interference methods, with multiple semi-reflective layers to tune the wavelengths blocked or passed. Because of this, they are fussy with the angle of the light, and ideally light would go through it perpendicularly. No problem, stick a filter on the front of the objective, as distant objects converge towards parallel light. The problem with this is cost. Generally, the front of optics are rather big, and price is roughly proportional to area. So everyone uses filters to the rear, between optics and sensor. Faster optics will tend to have a bigger spread of angle of light between optics and sensor. At an angle, your filter might not be doing what you thought it was.


Thanks for that explanation. That was quite informative.
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Found 2 primes in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,035,398)Cullen LLR Ruby: Earned 2,000,000 credits (2,047,548)ESP LLR Ruby: Earned 2,000,000 credits (2,033,639)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,014,465)PPS LLR Ruby: Earned 2,000,000 credits (4,429,320)PSP LLR Ruby: Earned 2,000,000 credits (2,107,810)SoB LLR Ruby: Earned 2,000,000 credits (3,832,186)SR5 LLR Ruby: Earned 2,000,000 credits (2,023,400)SGS LLR Ruby: Earned 2,000,000 credits (2,029,444)TRP LLR Ruby: Earned 2,000,000 credits (2,045,113)Woodall LLR Ruby: Earned 2,000,000 credits (2,097,219)321 Sieve Emerald: Earned 50,000,000 credits (58,668,497)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,500,349)PPS Sieve Double Silver: Earned 200,000,000 credits (242,998,535)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,516,062)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,329,228)AP 26/27 Sapphire: Earned 20,000,000 credits (20,303,946)GFN Sapphire: Earned 20,000,000 credits (23,785,191)PSA Double Bronze: Earned 100,000,000 credits (116,531,700)
Message 108139 - Posted: 25 May 2017 | 19:49:26 UTC - in response to Message 108136.
Last modified: 25 May 2017 | 19:50:06 UTC

Faster optics will tend to have a bigger spread of angle of light between optics and sensor. At an angle, your filter might not be doing what you thought it was.

This is especially true for narrowband filters such as H-a, S-II and O-III.

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Discovered 2 mega primesFound 2 primes in the 2018 Tour de PrimesFound 1 prime in the 2018 Tour de Primes Mountain StageFound 4 primes in the 2019 Tour de PrimesFound 2 primes in the 2019 Tour de Primes Mountain Stage321 LLR Ruby: Earned 2,000,000 credits (3,189,169)Cullen LLR Amethyst: Earned 1,000,000 credits (1,663,005)ESP LLR Turquoise: Earned 5,000,000 credits (5,040,754)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,621,320)PPS LLR Emerald: Earned 50,000,000 credits (57,267,257)PSP LLR Jade: Earned 10,000,000 credits (13,475,197)SoB LLR Jade: Earned 10,000,000 credits (11,477,912)SR5 LLR Jade: Earned 10,000,000 credits (16,756,859)SGS LLR Jade: Earned 10,000,000 credits (10,503,550)TRP LLR Turquoise: Earned 5,000,000 credits (6,063,597)Woodall LLR Amethyst: Earned 1,000,000 credits (1,534,611)321 Sieve Bronze: Earned 10,000 credits (17,666)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,165,870)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,012,635)PPS Sieve Double Silver: Earned 200,000,000 credits (307,048,987)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (727,064)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,187,678)AP 26/27 Emerald: Earned 50,000,000 credits (83,500,079)GFN Double Bronze: Earned 100,000,000 credits (123,603,829)PSA Emerald: Earned 50,000,000 credits (51,938,273)
Message 108633 - Posted: 14 Jun 2017 | 23:39:13 UTC

Anyone looking at Saturn tonight?

http://earthsky.org/?p=2909

Saturn is in opposition, is close to Earth, and rings are at maximum deflection.
____________

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"Wir müssen wissen. Wir werden wissen."
"We must know, we shall know."
- David Hilbert, 1930

Lord Of The Rats
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Posts: 1473
ID: 443224
Credit: 801,463
RAC: 6,448
321 LLR Bronze: Earned 10,000 credits (68,843)ESP LLR Silver: Earned 100,000 credits (174,782)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (75,592)PPS LLR Silver: Earned 100,000 credits (207,658)TRP LLR Silver: Earned 100,000 credits (218,748)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (56,248)
Message 108634 - Posted: 15 Jun 2017 | 0:17:23 UTC - in response to Message 108633.

Anyone looking at Saturn tonight?

http://earthsky.org/?p=2909

Saturn is in opposition, is close to Earth, and rings are at maximum deflection.



Too cloudy and too light here tonight. Despite it being 0100 local time it is not really dark. It is also pretty low in the sky for us northerners.

I did see it a couple of weeks ago and it was very good indeed even in a small telescope. It was well worth having a look. The rings are especially prominent at opposition..

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Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Ruby: Earned 2,000,000 credits (2,982,840)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,073,792)TRP LLR Silver: Earned 100,000 credits (122,712)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,343,583)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,575,874)GFN Sapphire: Earned 20,000,000 credits (23,247,434)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 108637 - Posted: 15 Jun 2017 | 7:34:22 UTC - in response to Message 108633.

Anyone looking at Saturn tonight?

http://earthsky.org/?p=2909

Saturn is in opposition, is close to Earth, and rings are at maximum deflection.


Day or two will not change anything :) Here,we got clouds and some little rain after month of dry and hot weather. But cloud are passing by, so I just must wait. Small telescope, and Saturn is beauty :)
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31*332^367560+1 CRUS PRIME
Proud member of team Aggie The Pew. Go Aggie!

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Joined: 27 Nov 11
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Credit: 262,948,860
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Found 1 prime in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,012,522)Cullen LLR Amethyst: Earned 1,000,000 credits (1,632,249)ESP LLR Ruby: Earned 2,000,000 credits (2,232,391)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,088,705)PPS LLR Ruby: Earned 2,000,000 credits (2,949,189)PSP LLR Ruby: Earned 2,000,000 credits (2,420,512)SoB LLR Amethyst: Earned 1,000,000 credits (1,780,064)SR5 LLR Ruby: Earned 2,000,000 credits (2,238,295)SGS LLR Ruby: Earned 2,000,000 credits (2,139,392)TRP LLR Ruby: Earned 2,000,000 credits (2,125,391)Woodall LLR Amethyst: Earned 1,000,000 credits (1,311,937)321 Sieve Turquoise: Earned 5,000,000 credits (5,190,731)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (207,387)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,049,697)PPS Sieve Double Bronze: Earned 100,000,000 credits (100,422,123)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,227,972)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,021,659)AP 26/27 Sapphire: Earned 20,000,000 credits (20,651,644)GFN Emerald: Earned 50,000,000 credits (56,955,991)