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George Jones
member
Reged: 09/27/08
Posts: 42
Loc: Saint John, NB, Canada
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Last night, I watched (using an 8" SCT) a dark feature rotate across Jupiter for more than an hour. The feature was in the southern part of North Equatorial Belt, possibly extending into the northern part of the Equatorial Zone. It looked quite similar to the dark feature (labeled as a blue festoon) in the right image at the top of
http://www.astrosurf.com/cidadao/jupiter_obs.htm
though I didn't see any colour.
The feature was best viewed between 8pm and 10pm EDT (0am and 2am GMT).
Did anyone else see this?
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Regards,
George
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Michael A. Earl
vendor- Canadian Satellite Tracking and Orbit Research
Reged: 11/17/08
Posts: 1111
Loc: Brockville, Ontario, Canada
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Hi George,
Yes! I saw the same spot you did on the early evening of the 19th of October. The spot was slightly south of the NEB and was indeed bluish green in color (to my eyes).
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earthbot1
super member
Reged: 08/27/09
Posts: 171
Loc: Central Virginia
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Good site for Jupiters features. Now I know what the Festoons are.
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Nexstar 8
Meade/Celestron EPs
Bushnell 90mm Mak-Cass
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tigerroach
sage
Reged: 08/13/08
Posts: 465
Loc: Houston, TX
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I've seen two or three of those in the last couple weeks, all in the NEB. One was so dark it looked like a moon shadow at moderate power.
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Brian
TeleVue TV-102, Gibralter alt-az mount
Webster 14.5" f/4.3 truss dob *under construction*
Canon 10x30 & 15x50 IS binocs
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Dean Norris
sage
Reged: 11/05/08
Posts: 426
Loc: Santa Cruz, Ca
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George, I have seen the spot you mentioned on your post and made a sketch of it as well. I observed it on 10/31/09 at 5:05 U.T. when it transited the meridian. I also noticed a bluish green tint to the spot and saw a festoon around the spot as well. it was dark and very noticeable resembling a shadow of a moon. 154x was the highest magnification I could use that night. It would be great to see this object at a higher power. I'll also look to see if anyone has imaged it. I hope to view this interesting object again. Thank you for bringing it to my attention.
Dean
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1971 10" Cave Newtonian F/6
MoonLite CR Focuser Telrad Finder 8x50 finder
TV 40mm, 32, 20, 7.4, Meade 6mm, UO 5mm, Meade 2x Barlow
7x50 Binoculars
Edited by Dean Norris (11/01/09 04:02 PM)
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