· Get a Cloudy Nights T-Shirt · Submit a Review / Article Click here if you are having trouble logging into the forums Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> Sketching Previous   Index   Next   Threaded   Pages: 1 frank5817 Postmaster Reged: 06/13/06 Loc: Illinois Jupiter, Io and Io’s Shadow       #5522232 - 11/16/12 03:39 AM Attachment (31 downloads) Edit   Reply   Quote Quick Reply   A cold night but the atmosphere settled down as the local time approached 11 pm. At nightfall I set up two telescopes and gave them 5 hours to cool down. At 11:15 pm local time I began sketching Jupiter and fixed in place the positions of Io, its shadow, the GRS and oval BA (Red Spot Jr.). Since I was getting a much better view of Jupiter in the 18 inch scope, I decided to use it for my sketch. My 10 inch scope is driven but I no longer have a working drive for the 18 inch scope, so I don’t often use it for sketching. The shadow of Io was at the northwest margin of the GRS. Io was diagonally across the GRS and just beyond Jupiter’s following limb. The oval BA in the south tropical zone seemed to have a dark disturbance above it in the south temperate zone. Two clearly visible festoons were projecting southward from the north equatorial belt. The southern edge of this belt was noticeably darker than the rest of the belt. And I could clearly see the north tropical zone and the north temperate belt with its darker northern margin. This is the best view of Jupiter I have seen in nearly a year. Sketching: Telescope: 18" f/5 Dob. with 9mm ortho. 254x and polarizing filter White Strathmore 400 series recycled paper 9" x 12" Various graphite pencils blending stumps and erasers Date and Time: 2012, November, 15; 05:15 UT - 06:00 UT Distance 4.11 AU V. mag. -2.8 Dia. 47.9" Phase 99.9% Transparency: 6/10 Seeing: 9/10 Temperature: -2° C (29° F) Frank McCabe Post Extras:       Asbytec Guy in a furry hat Reged: 08/08/07 Loc: La Union, PI Re: Jupiter, Io and Io’s Shadow [Re: frank5817]       #5522235 - 11/16/12 03:51 AM Edit   Reply   Quote Quick Reply   Wow, Frank, sweet observation! Lot of nice detail to compliment a beautiful event. Well done, sir. Post Extras:       niteskystargazer Carpal Tunnel Reged: 10/05/09 Loc: 41-43'-28" N 87-42'-39" W Re: Jupiter, Io and Io’s Shadow [Re: frank5817]       #5522726 - 11/16/12 11:24 AM Edit   Reply   Quote Quick Reply   Frank, Very good sketch of Jupiter & Io . CS,KLU, , Tom Post Extras:       Chopin Canis Insanus Reged: 02/03/05 Loc: In the doghouse. Re: Jupiter, Io and Io’s Shadow [Re: niteskystargazer]       #5523302 - 11/16/12 06:37 PM Edit   Reply   Quote Quick Reply   Frank, there is something so inexplicably 3-D about your image. Fantastic drawing! Post Extras:       frank5817 Postmaster Reged: 06/13/06 Loc: Illinois Re: Jupiter, Io and Io’s Shadow [Re: Chopin]       #5523410 - 11/16/12 08:06 PM Edit   Reply   Quote Quick Reply   Norme, Tom and Jason, Thank you all for your comments. We are having a brief spell of clear steady nights that we usually get in early fall. I'll take what I can get in the clear sky department. Frank Post Extras:       Asbytec Guy in a furry hat Reged: 08/08/07 Loc: La Union, PI Re: Jupiter, Io and Io’s Shadow [Re: frank5817]       #5523466 - 11/16/12 09:06 PM Edit   Reply   Quote Quick Reply   Good for you, Frank. Having had below average seeing and cloud cover, one can be envious. Post Extras:       cpr1 sage Reged: 03/24/12 Loc: Louisiana Re: Jupiter, Io and Io’s Shadow [Re: Asbytec]       #5523893 - 11/17/12 07:16 AM Edit   Reply   Quote Quick Reply   That looks great Frank. Lots of detail I like it. Post Extras:       Special Ed Postmaster Reged: 05/18/03 Loc: Greenbrier Co., WV 38N, 80W Re: Jupiter, Io and Io’s Shadow [Re: cpr1]       #5524818 - 11/17/12 06:11 PM Edit   Reply   Quote Quick Reply   Outstanding sketchwork, Frank. Congratulations on the seeing--you made the most of it--nice detail! I think the 3-D appearance mentioned by Jason is a function of Io standing off the following limb with that jet black shadow on the Jovian disk. These cold nights take some getting used to, don't they? When I looked at M1 the other night, the temp was 24°F and I was wearing 7 layers. The previous night was just as cold, but I wasn't wearing as many layers--learned my lesson. Post Extras:       JimPie professor emeritus Reged: 11/10/07 Loc: S.E.Michigan Re: Jupiter, Io and Io’s Shadow [Re: Special Ed]       #5525084 - 11/17/12 09:01 PM Edit   Reply   Quote Quick Reply   Frank, Fantastic sketch. You really captured a llot of detail in Jov's belts. The shadow of Io on GRS is an eye catcher. Post Extras:       frank5817 Postmaster Reged: 06/13/06 Loc: Illinois Re: Jupiter, Io and Io’s Shadow [Re: JimPie]       #5525435 - 11/18/12 02:10 AM Edit   Reply   Quote Quick Reply   Norme, Christopher,Michael and Jim, Thanks for your comments and kind remarks. --- Michael, As the years go by the cold gets me more quickly. My cold limit for sketching is about 20 degrees. I can't sketch and shiver at the same time. -- Jim Io and its shadow on either side of the GRS was wonder to see. Frank Post Extras:       Asbytec Guy in a furry hat Reged: 08/08/07 Loc: La Union, PI Re: Jupiter, Io and Io’s Shadow [Re: frank5817]       #5525451 - 11/18/12 02:25 AM Edit   Reply   Quote Quick Reply   Frank, you really nailed that one. Beautiful sketch of a beautiful event. Post Extras:       Tommy5 Carpal Tunnel Reged: 03/28/04 Loc: Chicagoland Re: Jupiter, Io and Io’s Shadow [Re: Asbytec]       #5526900 - 11/18/12 09:34 PM Edit   Reply   Quote Quick Reply   Great sketch of Jupiter, nice detail, good display of Io and shadow, thanks for sharing, aperture brings out great detail that your eye caught congrads.very realistic festoons also. Post Extras:       frank5817 Postmaster Reged: 06/13/06 Loc: Illinois Re: Jupiter, Io and Io’s Shadow [Re: Tommy5]       #5527062 - 11/18/12 11:22 PM Edit   Reply   Quote Quick Reply   Norme and Tommy5 Thank you for your nice words. --Tommy5 I don't know if you were able to observe this weekend but the sky was cooperating in the very early morning. I was out tonight sketching the Moon at nightfall and I just squeaked it in before the clouds. Frank Edited by frank5817 (11/18/12 11:24 PM) Post Extras:       Uwe Pilz scholastic sledgehammer Reged: 05/16/08 Loc: Leipzig, Germany Re: Jupiter, Io and Io’s Shadow [Re: frank5817]       #5527150 - 11/19/12 12:29 AM Edit   Reply   Quote Quick Reply   Dear Frank, that is a real great sketch. I had not much luck with the seeing this season and are waiting for better times. Post Extras:       frank5817 Postmaster Reged: 06/13/06 Loc: Illinois Re: Jupiter, Io and Io’s Shadow [Re: Uwe Pilz]       #5528132 - 11/19/12 02:58 PM Edit   Reply   Quote Quick Reply   Hello Uwe, I hope those clear good seeing skies reach you soon. It seems to be over with here for a while as clouds dominate again. Thank you. Frank Post Extras:       Rutilus Pooh-Bah Reged: 12/17/10 Re: Jupiter, Io and Io’s Shadow [Re: frank5817]       #5528182 - 11/19/12 03:22 PM Edit   Reply   Quote Quick Reply   Frank-Nice Jupiter sketch. Post Extras:       frank5817 Postmaster Reged: 06/13/06 Loc: Illinois Re: Jupiter, Io and Io’s Shadow [Re: Rutilus]       #5528413 - 11/19/12 05:12 PM Edit   Reply   Quote Quick Reply   Rutilus, Many thanks, a very enjoyable observing session. Frank Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 1 registered and 8 anonymous users are browsing this forum. 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