Palomar 15 (UGC 10642, PGC 59400, Zwicky 1 and others) is probably a Shapley-Sawyer class XII (http://en.wikipedia....entration_Class) globular cluster located approximately 147,000 light-years away in Ophiuchus. More information can be found in a 1984 paper here - https://ui.adsabs.ha...1816H/abstract.
I think this one is the faint cluster of stars to the right of center but the location varies with the source.
Luminance – 24x300s – binned 1x1 – 120 minutes
RGB – 8x180s – 24 minutes each – binned 2x2
182 minutes total exposure – 3 hours 2 minutes
Imaged June 13th, 17th, 18th and 21st, 2025 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.
LGRB - https://www.flickr.c...6878176/sizes/l
See the link above for the full size version.
Dan