M9

M9 (NGC 6333 and others) is a Shapley-Sawyer class VIII (https://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 5,500 light-years away in Ophiuchus.

Luminance – 22x240s – 88 minutes – binned 2x2
RGB – 13:12:14x240s – 52:48:56 minutes each – binned 2x2

244 minutes total exposure – 4 hours 4 minutes

Imaged April 25th, 28th and 30th and May 1st, 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/52982049323/sizes/l/
LRGB crop - https://www.flickr.com/photos/dcrowson/52981591211/sizes/l/

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