Messier 15 (NGC 7078) is a globular cluster in the constellation Pegasus. It is estimated to be about 33,600 light-years from Earth and 175 light years in diameter, and contains over 100,000 stars. At an estimated 12.0 billion years old, it is one of the oldest known globular clusters, clearly showing a large number of red giant stars. M15 is one of the most densely packed globular clusters known in the Milky Way galaxy. Its large dense core has undergone 'core collapse' and contains an enormous number of stars surrounding what may be a central black hole.

This is a stack of 34 one-minute subs taken with my QHY247C at 4000/255 gain/offset using my Celestron 11" Edge HD OTA on my CGE Pro. Images were stacked in Deep Sky Stacker and processed in PixInsight.

Image Center:	View full size annotated image.
Right Ascension:	21h 29m 58.397s (322° 29m 35.961s)
Declination:	+12° 9m 58.176s
Orientation:	Up is 0.7 degrees East of North.
Image Size:	28.843' x 19.248'	Pixel Scale:	0.288"

Principal objects in field: M 15, NGC 7078

All identified catalog objects: HD 204688, HD 204712, NGC 7078