Thanks Bob for the explanation. How do you explain the GRS transit issue? Sky Charts shows a GRS transit time of 19:35 for Sept. 2nd, 2009, but Calsky shows a transit time of 20:51.
Travis ________________________________ From: bobrose500 <[email protected]> To: [email protected] Sent: Thursday, September 3, 2009 7:13:56 PM Subject: [skychart-discussion] Re: No Moonless Jupiter?? One show visibility the other shows orbit. Both are correct for position. Callisto, though CdC show it outside the disk of Jupiter it is in the shadow of Jupiter. CalSky predicts planet shadow. Bob --- In skychart-discussion @yahoogroups. com, "kochab_1" <kocha...@.. .> wrote: > > Last night I was using Cartes du Ciel (V3) to figure out the time that > Jupiter would be moonless. However, increasing the time increments and > watching Jupiter and its moons rotate, it never became moonless. One moon > remained visible and the other moons started to become visible before that > one moon had a chance to disappear. I ran the same cycle on CALSky and > Jupiter did become moonless. I am using the same location information in > CALSky as I do in Carte du Ciel. Is there an error in the program and can it > be corrected? I have also noticed that the GRS transit times appear to be off > as well as compared to CALSky. Any comments or suggestions would be greatly > appreciated. > > Thanks! > Travis > [Non-text portions of this message have been removed]
