Whirlpool Galaxy M51 Whirlpool Galaxy in Canes Venatici Technical Details Telescope: C11 Mount: MI-250 Camera: SBIG ST-10XME Filters: Astrodon LRGB Dates: April 19-20, 2006 Exposure: Lum=8x9min (72mins), RGB=5x9min each for 207 minutes (3.45hrs) total at -25C Notes: This spiral galaxy is about 37 million light years away.