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perfessor
sage
Reged: 12/30/07
Posts: 306
Loc: Northern Illinois
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My club had its monthly dark-site star party, up by the Wisconsin border. There was a lot of moisture in the air, causing various problems including, but not limited to, dew, clouds, and multi-colored atmospheric effects on low-angle viewing of bright objects. I did not attempt to add these colors to my sketches.
I learned that Jupiter has a rather fast rotational period. Yes, I already knew this. But it's one thing to know that a Jovian day is 9-1/2 hours; it's quite another to try to get it to sit still while your sketching opportunities stretch out over several hours. In any case, I was treated to a nice leisurely transit of the spot from one limb to the other over the course of the session.
To my eyes, the northern bands were more numerous and pronounced; the NEB was particularly dark and well-defined, widely separated from the next thin band. The SEB looked wider, light in the middle, and mottled (sorry, I'm not good enough to see whorls or plumes or anything). The Great White Spot (do people still call it the Red Spot?) sat in a well-defined nest at the southern edge of the band.
The four moons were all strung out to the following side, like ducklings in a row. No shadow transits or anything to observe there.
Elsewhere on the field, I got a viewing of M13 through an Obsession 18", and saw the vivid color of the Blue Snowball nebula through a 13". Another neighbor had a binoviewer on his 8" dob, which gave very sharp views. So it was a good night to enjoy the sky.
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Tom
"Don't always know what I'm talkin about"
8" f/7
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perfessor
sage
Reged: 12/30/07
Posts: 306
Loc: Northern Illinois
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Oh, and some technical details:
8" f/7 dob;
235x and 110x
I apologize for the smudges, but I left them since that's how the disk looked - a swimming mass of semi-discernible details. Eventually I gave up on the high powers, and barlowed my Televue 26mm plossl - this arrangement worked great, I like that eyepiece more and more.
Thanks for looking!
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Tom
"Don't always know what I'm talkin about"
8" f/7
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rolandlinda3
Carpal Tunnel
Reged: 01/24/06
Posts: 1547
Loc: Crozet VA 22932
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Looks good to me. Got it in the evening of the 31st and it looked like what you had. We had lots of moisture also so it was fuzzy. Interesting comment on your EP...I have had real good times with a TV32 and make similar comments about it. Roland
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frank5817
Carpal Tunnel
Reged: 06/13/06
Posts: 2892
Loc: Illinois
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Tom,
Very nice sketches and report.   The color of the GRS is like you say a very pale pink (white) sometimes difficult to distinguish from beige. One other nights it is more colorful. Your sketches nicely match my view most nights so far this season. When you get one of those nearly perfect nights it is truly stunning and colorful. It would help if Jupiter was a little higher when on the meridian. Your 8" f/7 scope is perfect for planets and the moon. Thanks for posting.
Frank 
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Tommy5
Pooh-Bah
Reged: 03/28/04
Posts: 1382
Loc: Chicagoland
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great sketches and report on jup, i had a similar view also last night frrom chicagoland, thanks for posting jup was really a joy when the air got very still.
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CarlosEH
Carpal Tunnel
Reged: 01/19/05
Posts: 2992
Loc: Pembroke Pines, Broward County...
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Tom,
Two excellent observations of Jupiter. Jupiter always presents a challenge to the observer but it is worth the effort. Thank you for sharing it with us all.
Carlos
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perfessor
sage
Reged: 12/30/07
Posts: 306
Loc: Northern Illinois
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Thanks all for your kind words. 
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Tom
"Don't always know what I'm talkin about"
8" f/7
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ozzy9039
sage
Reged: 11/12/07
Posts: 202
Loc: Tampa,, Fl.
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Great sketches! I got a quick one saturday (Aug 2nd) night, but that was the only thing I got before it clouded up. 
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"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
---Albert Einstein---
-Celestron 8SE-
-Orion 80ST
-Home Made 60mm Refractor (In The Works)
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Special Ed
Post Laureate
Reged: 05/18/03
Posts: 3437
Loc: Greenbrier Co., WV 38N, 80W
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Tom,
Very good sketches! You recorded the appearance of the major features nicely. I always like to see sequences and Jupiter is particularly suited for that since, as you noted, it spins so rapidly (that does create its own difficulties though, yes?  ).
Keep up the good work.
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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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