Jupiter Moons

[Ingo]

Last night I just set up the camera on a tripod pointing out the open window and took some shots of Jupiter's moons.

D50 and 300mm & F5.6

I plan to do this every night for a few nights if the weather holds out.

But can somebody tell me why on Wikipedia it tells me Callisto's orbital period is ~16.7 days, but when I open up Stellarium, everytime I move a day forward Callisto does a full revolution around Jupiter?

[iceman]

16.7 days sounds about right, there's no way Callisto orbits Jupiter every day.

Try moving forward an hour and see what it does?

[Ingo]

Oh, it was some other movement, I took the ground and atmosphere off, and went forward about 10 days, and I see what was wrong now. Thanks :thumbsup: