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Old 09-09-2011, 11:11 AM
Rob_K
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Rob_K is offline
 
Join Date: Oct 2006
Location: Bright, Vic, Australia
Posts: 2,187
Hi Gem. Probably the easiest is S&T's Jupiter's Moons :
http://www.skyandtelescope.com/obser...script/jupiter

Jupiter 2 is pretty widely used freeware:
http://www.astrosurf.com/rondi/jupiter/

Cheers -
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