mackguyver said:+1 on Stellarium, too, it's a perfect companion to The Photographer's Ephemeris and I just bought the paid version for my Android.lintoni said:1. You have time before Sunday to practice the shot, so I'd check where it's rising this evening, or Saturday and try some shots to gve you an idea of the best set up for you. I use Stellarium (freeware, excellent) if I'm planning pictures involving astral bodies other than the sun. There won't be enough size difference to mess up approximations of this sort.
Personally, I use WorldWide Telescope from Microsoft Research. Full color, high resolution sky survey (excellent for astrophotography), and some cool 3D mapping of the solar system:
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