NGC 6535 (Melotte 189 and others) is a Shapley-Sawyer class XI (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 22,200 light-years away in Serpens Cauda.
2MASX J18032745-0017427 (PGC 61331 and others) is the galaxy to the right (west) of NGC 6535. It appears to be heavily obscured by dust.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged over nine nights in April and May, 2020 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
LRGB - https://www.flickr.com/photos/dcrowson/49934910046/sizes/l/