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RussL
Music Maker
   
Reged: 03/18/08
Posts: 1925
Loc: Cayce, SC
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Caught the GRS last night (thanks Sky and Telescope) last night after dinner. I put the 8" SCT on it, but the view was kinda soft, perhaps due to atmospherics, and perhaps due to collimation. 161x was about the best I could do, anything higher not showing any further deail. I noticed a dark spot just behind the GRS, following it, but couldn't resolve it well enough to see any detail in it. I also tried the 120ST on the scene, but the SCT gave a better image, of course (although not as much better as I expected). Anyway, now I'm curious about the dark spot behind the GRS. It wasn't a moon shadow, but was rather elongated and brownish.
Anyone else catch a glimpse?
-------------------- --Dawg, the Russell
"Akita mani yo." Observe everything as you walk. (--Lakota)
Celestron Celestar 8 Standard SCT, f10
Celestron 80mm Wide View ref., f5
Orion 120ST ref., f5
Criterion RV-6 Dynascope, Newt., f8, (c. 1962)
Sears Discoverer 60mm ref., f7, (c. 1973)
Celestron Ultima DX 10x50, 6.5 TFOV
Tasco 7x35 wide
Several mediocre eyepieces
Edited by RussL (11/07/09 12:11 PM)
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starrancher
professor emeritus
Reged: 06/09/09
Posts: 613
Loc: Northern Arizona
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Quote:
Anyway, now I'm curious about the dark spot behind the GRS. It wasn't a moon shadow, but was rather elongated and brownish.
That thing wasn't there last year . I noticed it the first time I caught Jupiter earlier this year & then saw articles about the new feature . ....This is one of the things that is so cool about Jupiter . It changes all the time . I miss some of the smaller white spots that were in the NEB a couple years ago . At times , the thing looked like a Teenage Mutant Ninja Turtle with the eye holes cut out in the bandanna . Does anyone remember that ?
-------------------- LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
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RLTYS
Carpal Tunnel
   
Reged: 12/18/04
Posts: 2156
Loc: New York (Long Island)
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RussL
I first observed the dark spot last August (8/19/09) with a 15" refl. As you stated it appeared brownish and elongated.
Clear Skies. Rich (RLTYS)
-------------------- 10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
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RussL
Music Maker
   
Reged: 03/18/08
Posts: 1925
Loc: Cayce, SC
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Quote:
the thing looked like a Teenage Mutant Ninja Turtle with the eye holes cut out in the bandanna .
Sorry I missed that, lol. Now, that's high adventure making faces in the clouds of Jupiter. Cool!
Well, maybe I'll start looking for some close-up pics for the Great Dark Spot.
-------------------- --Dawg, the Russell
"Akita mani yo." Observe everything as you walk. (--Lakota)
Celestron Celestar 8 Standard SCT, f10
Celestron 80mm Wide View ref., f5
Orion 120ST ref., f5
Criterion RV-6 Dynascope, Newt., f8, (c. 1962)
Sears Discoverer 60mm ref., f7, (c. 1973)
Celestron Ultima DX 10x50, 6.5 TFOV
Tasco 7x35 wide
Several mediocre eyepieces
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SteelStar
newbie
Reged: 11/08/09
Posts: 2
Loc: Oklahoma
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I noticed this feature on the 6th as well. I saw it in early October observations too.
Will be interesting to see how long it remains.
-------------------- XT12 Classic Dob
C6R refractor on Atlas mount
120ST refractor
PST solar scope
Orion 9x63 binos
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Special Ed
Post Laureate
Reged: 05/18/03
Posts: 4302
Loc: Greenbrier Co., WV 38N, 80W
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Quote:
...I noticed a dark spot just behind the GRS, following it, but couldn't resolve it well enough to see any detail in it. I also tried the 120ST on the scene, but the SCT gave a better image, of course (although not as much better as I expected). Anyway, now I'm curious about the dark spot behind the GRS. It wasn't a moon shadow, but was rather elongated and brownish.
Anyone else catch a glimpse?
That dark area ( perhaps called a barge) started to form in early July. It was visible in images made all through July, but was difficult to see visually until well into August. In sketched observations I made on August 4th and that Sol Robbins made on August 2nd, neither of us detected the barge. By mid-August, visual observers were starting to see it as RLTYS reported above. By the end of August, it was quite dark and prominent (see this sketch) .
I've been unable to do much astronomy the past couple of months and consequently have lost touch with what Jupiter is looking like these days (except for images). From your report, it sounds like the barge is still quite visible.
--------------------
Michael Rosolina
8" f/10 Orange Tube SCT
4.25" f/4.2 Astroscan Reflector
SVP 3.6" f/13.6 CA Reflector
40mm PST f/10
APM Germany HD 15x70 binoculars
Canon 12x36 IS II binoculars
Mark I Eyeball
My CN Gallery
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