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Date: 02 Aug 2006 11:49:13
From: John Banister
Subject: Jupiter 8/1/06
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Anyone view Jupiter last night (8/1/06)? If so did you notice a small dark
oval moving along the north equitorial band from 22:00 CDT (03:00 GMT) to
23:00 CDT? It initially looked like a shadow of a moon but my software
indicates that there was no shadow at the time, and the dark oval seemed to
be flattened, rather than round. North-south it seemed to be about the same
size as a moon shadow but was about twice as wide on the East West axis.
Here is my observing report:
"C10 NGT at 200X. N&S Eq bands evident. Swirling in Eq zone. 22:08:
observed small black blotch on southern edge of N Eq band. Initially thought
it might be a moon shadow, but no shadowing at that time. Blotch was a
flattened oval about 5 deg. E of meridian. Reobserved at 22:49L. Blotch
still evident on S. edge of N. Eq band, this time abut 20 deg from W limb.
Blotch was followed by a larger white oval which seemed to touch black
blotch and extend to the meridian, i.e. trailing edge of white oval was on
the meridian and leading edge W. of meridian, touching black spotch. White
oval looked a bit like Great Red Spot in shape but was about 3/4 it's size.
No color on planet noted, so objects mentioned could be colored instead of
black and white. 4 Jovian moons evident W/ 20 mm (60X)."
Thanks.
-John
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Date: 02 Aug 2006 14:21:42
From:
Subject: Re: Jupiter 8/1/06
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David Knisely wrote:
> > Anyone view Jupiter last night (8/1/06)? If so did you notice a small dark
> > oval moving along the north equitorial band from 22:00 CDT (03:00 GMT) to
> > 23:00 CDT?
>
> Yes, I did. I was viewing at between 0230 and 0345 UT on August 2nd
> (UT) using a 4 inch refractor at about 143x and noted a small darkening
> almost in the middle of the north equatorial belt. Seeing wasn't good
> enough to try higher power, but the small darkening was there. Clear
> skies to you.
> --
I distinctly observed a dark spot in about the same location and time
from Michigan.
It appeared visually in the south, but since I'm using a reflector,
that would be North I believe.
Being a rookie, I was tickled to see what I thought was very clearly a
jovian moon passing between me and Jupiter to create a dark black spot.
So .... no moon was supposed to be there? I really don't think that
was any natural surface storm or feature, it was a small, sharply
defined black disc
best,
rob anderson
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Date: 02 Aug 2006 12:30:26
From: atasselli@hotmail.com
Subject: Re: Jupiter 8/1/06
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John Banister wrote:
> Anyone view Jupiter last night (8/1/06)? If so did you notice a small dark
> oval moving along the north equitorial band from 22:00 CDT (03:00 GMT) to
> 23:00 CDT? It initially looked like a shadow of a moon but my software
> indicates that there was no shadow at the time, and the dark oval seemed to
> be flattened, rather than round. North-south it seemed to be about the same
> size as a moon shadow but was about twice as wide on the East West axis.
> Here is my observing report:
>
> "C10 NGT at 200X. N&S Eq bands evident. Swirling in Eq zone. 22:08:
> observed small black blotch on southern edge of N Eq band. Initially thought
> it might be a moon shadow, but no shadowing at that time. Blotch was a
> flattened oval about 5 deg. E of meridian. Reobserved at 22:49L. Blotch
> still evident on S. edge of N. Eq band, this time abut 20 deg from W limb.
> Blotch was followed by a larger white oval which seemed to touch black
> blotch and extend to the meridian, i.e. trailing edge of white oval was on
> the meridian and leading edge W. of meridian, touching black spotch. White
> oval looked a bit like Great Red Spot in shape but was about 3/4 it's size.
> No color on planet noted, so objects mentioned could be colored instead of
> black and white. 4 Jovian moons evident W/ 20 mm (60X)."
> Thanks.
>
What you observed is very likely a festoon (there are 13 of them) as
they can be quite dark where they touch the NEBs (let's say at their
"root"). Some, but not all, are accompanied by a bright ammonia spot (a
source) so what you observed is quite plausible.
Andrea T.
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Date: 02 Aug 2006 12:20:30
From: decaf
Subject: Re: Jupiter 8/1/06
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canopus56 wrote:
> "John Banister" <banister@9plus.net> wrote in message
> news:eaql4k01olv@enews1.newsguy.com...
> <snip>
> Either that, our you are talking about the Great Red Spot, Jr. , also
> discussed at the S&T site. - C
No way; GRS Jr is not very dark and is difficult to detect w/o
good seeing.
DC
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Date: 02 Aug 2006 14:11:28
From: David Knisely
Subject: Re: Jupiter 8/1/06
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> Anyone view Jupiter last night (8/1/06)? If so did you notice a small dark
> oval moving along the north equitorial band from 22:00 CDT (03:00 GMT) to
> 23:00 CDT?
Yes, I did. I was viewing at between 0230 and 0345 UT on August 2nd
(UT) using a 4 inch refractor at about 143x and noted a small darkening
almost in the middle of the north equatorial belt. Seeing wasn't good
enough to try higher power, but the small darkening was there. Clear
skies to you.
--
David W. Knisely KA0CZC@navix.net
Prairie Astronomy Club: http://www.prairieastronomyclub.org
Hyde Memorial Observatory: http://www.hydeobservatory.info/
**********************************************
* Attend the 13th Annual NEBRASKA STAR PARTY *
* July 23-28, 2006, Merritt Reservoir *
* http://www.NebraskaStarParty.org *
**********************************************
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Date: 02 Aug 2006 14:57:11
From: John Banister
Subject: Re: Jupiter 8/1/06
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Thanks, that agrees with what I saw, but my seeing allowed higher power.
The Moon, in the same general area of the sky, easily allowed 300X.
I wonder what this darkening was? My extimate is that it passed the meridian
at approx. 03:20 GMT, which would pit it 3.5 hours ahead of the Great Red
Spot, according to my software. If that relationship holds true, it will
not be visible from my site tomorrow but should be viewable around midnight
(05:00 GMT) Thurs night. Jupiter is quite low then, so we'll see. Maybe
someone away from North America can give it a try.
-John
"David Knisely" <KA0CZC@navix.net > wrote in message
news:46b04$44d0f8d6$471c9319$17552@ALLTEL.NET...
>> Anyone view Jupiter last night (8/1/06)? If so did you notice a small
>> dark oval moving along the north equitorial band from 22:00 CDT (03:00
>> GMT) to 23:00 CDT?
>
> Yes, I did. I was viewing at between 0230 and 0345 UT on August 2nd (UT)
> using a 4 inch refractor at about 143x and noted a small darkening almost
> in the middle of the north equatorial belt. Seeing wasn't good enough to
> try higher power, but the small darkening was there. Clear skies to you.
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Date: 02 Aug 2006 20:21:56
From: Michael McCulloch
Subject: Re: Jupiter 8/1/06
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On Wed, 2 Aug 2006 14:57:11 -0500, "John Banister"
<banister@9plus.net > wrote:
>Thanks, that agrees with what I saw, but my seeing allowed higher power.
>The Moon, in the same general area of the sky, easily allowed 300X.
>
>I wonder what this darkening was?
Dare I say it?
The Monolith!
:-)
---
Michael McCulloch
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Date: 02 Aug 2006 17:41:27
From: Starlord
Subject: Re: Jupiter 8/1/06
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Hmmm ... Monolith is not round, maybe you saw a Shodow Battleship heading
for the IO jump point on it's way to Babylon 5
Hay! The Vorlon Planet killer is mostly round.
--
The Lone Sidewalk Astronomer of Rosamond
Telescope Buyers FAQ
http://home.inreach.com/starlord
Sidewalk Astronomy
www.sidewalkastronomy.info
Astronomy Net Online Gift Shop
http://www.cafepress.com/astronomy_net
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http://www.cafepress.com/ingarden
Blast Off Online Gift Shop
http://www.cafepress.com/starlords
Astro Blog
http://starlord.bloggerteam.com/
"Michael McCulloch" <michaelm@nospam.invalid.net > wrote in message
news:61g2d2pfenf6uh33s2lvjnd14igqn8aai2@4ax.com...
> On Wed, 2 Aug 2006 14:57:11 -0500, "John Banister"
> <banister@9plus.net> wrote:
>
>>Thanks, that agrees with what I saw, but my seeing allowed higher power.
>>The Moon, in the same general area of the sky, easily allowed 300X.
>>
>>I wonder what this darkening was?
>
> Dare I say it?
>
> The Monolith!
>
> :-)
>
> ---
> Michael McCulloch
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Date: 02 Aug 2006 11:41:36
From: canopus56
Subject: Re: Jupiter 8/1/06
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"John Banister" <banister@9plus.net > wrote in message
news:eaql4k01olv@enews1.newsguy.com...
<snip >
Either that, our you are talking about the Great Red Spot, Jr. , also
discussed at the S&T site. - C
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Date: 02 Aug 2006 15:06:42
From: John Banister
Subject: Re: Jupiter 8/1/06
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On the subject of GRS Jr., I've only nailed it once, about 6 weeks ago, and
it's getting harder and harder to even give it a try. It either passes too
early when it's not twilight or too late when Jupiter has descended in the
west where seeing is poor and light polution is the greatest from my side.
Now it (and Sr.) seems to only hit a proper window (around 9:30 local) on
Wednesdays, and I'm gone that night.
Can anyone do something about that? ;-)
-John
"canopus56" <canopus56@NOyahooSPAM.com > wrote in message
news:44d0e3d5$0$26128$3a2ecee9@news.csolutions.net...
> "John Banister" <banister@9plus.net> wrote in message
> news:eaql4k01olv@enews1.newsguy.com...
> <snip>
> Either that, our you are talking about the Great Red Spot, Jr. , also
> discussed at the S&T site. - C
>
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Date: 02 Aug 2006 11:35:48
From: canopus56
Subject: Re: Jupiter 8/1/06
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"John Banister" <banister@9plus.net > wrote in message
news:eaql4k01olv@enews1.newsguy.com...
> Anyone view Jupiter last night (8/1/06)? If so did you notice a small
> dark oval moving along the north equitorial band from 22:00 CDT (03:00
> GMT) to 23:00 CDT?
Congratulations, you have seen the Great Red Spot, which transited at the
following UTC times on 8/1 and 8/2/2006:
August 1, 0:57, 10:53, 20:48
Aug 2, 6:44, 16:40
See the Sky & Telescope homepage for their Jupiter observing tips. They
have a calculator and a list of GSR transit times for the rest of the year.
and a list of all the transit for the remainder of this calendar year.
http://skyandtelescope.com/observing/objects/planets/article_107_1.asp
http://skyandtelescope.com/observing/objects/planets/article_107_1.asp
- Canopus56
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Date: 02 Aug 2006 14:59:29
From: John Banister
Subject: Re: Jupiter 8/1/06
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Thanks, but it wasn't the GRS. Wrong side of the equator. I try and view
that at least once a week lately, when conditons allow. Jupiter had pretty
much set by the time the GRS came around.
-John
"canopus56" <canopus56@NOyahooSPAM.com > wrote in message
news:44d0e279$0$26152$3a2ecee9@news.csolutions.net...
> "John Banister" <banister@9plus.net> wrote in message
> news:eaql4k01olv@enews1.newsguy.com...
>> Anyone view Jupiter last night (8/1/06)? If so did you notice a small
>> dark oval moving along the north equitorial band from 22:00 CDT (03:00
>> GMT) to 23:00 CDT?
>
> Congratulations, you have seen the Great Red Spot, which transited at the
> following UTC times on 8/1 and 8/2/2006:
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Date: 02 Aug 2006 10:57:25
From: Brian Tung
Subject: Re: Jupiter 8/1/06
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Kurt (canopus56) wrote:
> Congratulations, you have seen the Great Red Spot, which transited at the
> following UTC times on 8/1 and 8/2/2006:
I don't think so. John said the object he observed was in the northern
equatorial belt, not the southern. And even if he got north and south
mixed up, he said that the object was at the *southern* edge of the
*northern* equatorial belt--that is, it was toward the equator from the
center of the belt. The GRS is on the southern edge of the SEB, *away*
from the equator.
I don't know what it was; I'm afraid to say I only observed Jupiter with
binoculars yesterday.
--
Brian Tung <brian@isi.edu >
The Astronomy Corner at http://astro.isi.edu/
Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/
The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.html
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Date: 03 Aug 2006 11:04:00
From: canopus56
Subject: Re: Jupiter 8/1/06
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"Brian Tung" <brian@isi.edu > wrote in message
news:eaqp25$d2t$1@praesepe.isi.edu...
> I don't think so. John said the object he observed was in the northern
> equatorial belt, not the southern. <snip>
Clearly, I missed the boat on this one and other posters got it right. - C
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