M31 Andromeda Galaxy M31 in Andromeda Technical Details Telescope: FSQ-106 Mount: MI-250 Camera: SBIG ST-10XME Filters: Astrodon LRGB Dates: October 31 and Dec 10-14 2007 Exposure: Lum=39x5min (195mins), RGB=5min each, 43 Green, 40 blue, and 41 red subexposures for 620 minutes (13.6hrs) total at -25C Notes: This galaxy is about 2.25 million light years away. It is visible to the naked eye. Larger than the Milky Way, this galaxy contains about a trillion stars.