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 (Mike)]

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]

Originally Posted by 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?

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