M107

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 – 39x300s – 195 minutes – binned 2x2
RGB – 40:42:39x300s – 200:210:195 minutes each – binned 2x2

800 minutes total exposure – 13 hours 20 minutes

Imaged over nine nights in March, 2023 and six nights in April, 2025 at the El Sauce Observatory (Rio Hurtado, Chile) with a QHY 600M on a PlaneWave CDK24 at f/6.5 3974 mm.

LRGB - https://www.flickr.com/photos/dcrowson/54476355953/sizes/l

These are Telescope Live (https://telescope.live/) “One-Click Observations.”