M22 (NGC 6656) - Sagittarius Cluster
Messier 22 (NGC 6656), also known as the Sagittarius Cluster, is a globular cluster located in the constellation Sagittarius, in the Galactic Center of the Milky Way Galaxy in the Local Group of galaxies. M22 is 10,600 light years away from Earth.
M22 is best viewed during late summer, is magnitude 5.1, and can be viewed with naked eye (barely). M22 is 32' in apparent size. For reference, the full moon is 30' (arc minutes) in size.
* The naked eye can see up to magnitude 8 objects under ideal dark sky conditions.