M12

M12 (NGC 6218) is a Shapley-Sawyer class IX (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 15,700 light-years away in Ophiuchus.

Luminance – 17x300s – 85 minutes – binned 2x2
RGB – 18:15:21x300s – 90:75:105 minutes each – binned 2x2

335 minutes total exposure – 5 hours 35 minutes

Imaged May 15th, 16th and 17th, 2023 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/52907442394/sizes/l/

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