M107 (NGC 6171 and others) is a Shapley-Sawyer class X (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 19,500 light-years away in Ophiuchus.
Luminance – 26x600s – 260 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
380 minutes total exposure – 6 hours 20 minutes
Imaged May 24th and June 23rd and 24th, 2020 and May 12th, 13th and 15th, 2021 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/51191055215/sizes/l/