M2 (NGC 7089) is a Shapley-Sawyer class II (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 37,500 light-years away in Aquarius.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged August 26th and 31st and September 3rd, 2019 from Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
Also see my previous 600mm refractor image here - https://www.flickr.com/photos/dcrowson/28882776594.