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Tired Fly
member
Reged: 07/21/08
Posts: 11
Loc: North Central Illinois
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I just came in from a 3 hour session. I am in North Central Illinois and tonight was great. I started looking at Jupiter and one of it's moons was fairly close. After awhile, it looked closer. I know they change nightly, but I didn't realize you can actually see them move! I watched it for two hours and the last time I could see it was 10:54, then it was gone. I am amazed.  Is there any sort of moon chart for Jupiter? I'm curious as to when it actually went behind (or it front) of the planet.
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Hrundi
super member
Reged: 02/06/08
Posts: 118
Loc: Estonia
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As far as I understand, stellarium should be fairly accurate with the moons.
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tigerroach
sage
Reged: 08/13/08
Posts: 318
Loc: Houston, TX
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One of the tools on skyandtelescope.com will help you plan for moon events like that one.
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Brian
TeleVue TV-102, Gibralter alt-az mount
Webster 14.5" f/4.3 truss dob *under construction*
Canon 10x30 IS binocs
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kaaikop
sage
Reged: 07/13/08
Posts: 468
Loc: Ste-Therese, Canada
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This little free program is really fantastic:Jupiter
I use it every night 
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Benoit, RASC Montreal
-C 9.25XLT on EQ6 Pro / ED80SF on Portamount
-Plossls, Radians, Naglers, LVW's & Orthos.
-a pair of 7x50's
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Out of Focus
sage
Reged: 09/23/07
Posts: 232
Loc: Roseville (Sac) CA
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Last night the moon you refer to passed behind the planet. A few nights ago a moon transited in front of Jupiter. You could see the small black dot as it passed.
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Orion XT10i w/FT
Orion XT6
Orion Mini Giant 15X63
Orion ST80-A
24mmHyperion,13mmEthos,
9mmNagler
AO series 160 &
L10 Microscopes
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Blue Canyon, Placer Co. CA
 
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Knightmare
member
Reged: 07/05/08
Posts: 22
Loc: NC, USA
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Yeah, Io transited in front of Jupiter Friday night. A member of the Astronomy club that I am a member of caught it with his webcam. It turned out very well.
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Celestron Powerseeker 127mm EQ Newt Reflector
Vivitar 7x50 Binos
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Exit-pupil
sage
Reged: 11/13/07
Posts: 206
Loc: Eastern Long Island, NY
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The Jupiter2 program that kaaikop posted is neat. I use it every night too.
http://www.astrosurf.com/rondi/jupiter/index.htm
Jono
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smasraum
sage
Reged: 01/13/08
Posts: 492
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Isn't it amazing how quickly Jupiter's moons change. I'd second the recommendation for Stellarium. I've found that Stellarium is accurate for the positions of the moons of Jupiter and Saturn as well as the GRS on Jupiter and pretty much everything else. Not only that, but it's free. Also, I think that many/most of the astronomy magazines have a chart in every month showing that sort of thing.
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Steve
Houston (Friendswood), TX
 Space Center Houston
8" Zhumell Dob - Woo Hoo!!
Celestron C102 f/5 - Thanks Tim!
21mm, 13mm Hyperion
2.5x TV Powermate
Canon Rebel XT
Nikon 7x35
Bushnell 10x50
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