M71

Posted by dcrowson
on Friday, September 15, 2017

Messier 71 (NGC 6838) is a Shapley-Sawyer class X-XI (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 13,000 light-years away in Sagitta.

Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

360 minutes total exposure – 6 hours

Imaged September 11th, 12th and 14th, 2017 from Dark Sky New Mexico at 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/37248434885/sizes/l

See my wider, refractor image here - https://www.flickr.com/photos/dcrowson/20005435454/sizes/l.

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