Animas, New Mexico
Imaged February 29th, March 16th and 31st, 2016 from Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
LRGB – https://www.flickr.com/photos/dcrowson/25752178963/sizes/l
M3 (NGC 5272) is a Shapley-Sawyer class VI (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 34,000 light-years away in Canes Venatici.
Luminance â€“ 24x600s â€“ 240 minutes â€“ binned 1×1
RGB â€“ 8x300s â€“ 40 minutes each â€“ binned 2×2
360 minutes total exposure â€“ 6 hours