This is the bright (6th magnitude) and large (about 40 to 60 arc minutes) globular star cluster Messier 55 in Sagittarius. Visually, it is surprisingly large, rich and resolvable in the eyepiece, but tends to get ignored as it is so isolated in eastern Sagittarius, and it is quite low for northern observers. Even Charles Messier himself had difficulty finding it after Nicholas Lacaille reported it to him.

The field of view is 2.4° by 1.6°.

Technical:
This is a stack of 8 x 6 minute exposures with the Askar APO120 refractor at f/7 and the Canon Ra at ISO 800. Taken from the Quailway Cottage in southeast Arizona in October 2024.