M22 (NGC 6656 and others) is a Shapley-Sawyer class VII (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 10,600 light-years away in Sagittarius.
Luminance – 8x600s – 80 minutes – binned 1x1
RGB – 8:8:9x600s – 80:80:90 minutes each – binned 1x1
300 minutes total exposure – 5 hours 30 minutes
Imaged March 22nd, April 17th and May 6th, 18th and 23rd, 2021 at the El Sauce Observatory (Rio Hurtado, Chile) with a FLI PL 9000 on a PlaneWave CDK24 at f/6.5 3974 mm.
This is a Telescope Live (https://telescope.live/) “One-Click Observation.” These are automated data collection sessions that run when the scopes are otherwise not in use. Create a free trial account to download some of this data. Use my referral promo code SUFM5 when you sign up to receive 20% off if you continue after the trial.
LRGB _ https://www.flickr.com/photos/dcrowson/51199574575/sizes/l/