Messier 13 or M13, also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is a globular cluster of several hundred thousand stars in the constellation of Hercules. (Wiki https://en.wikipedia.org/wiki/Messier_13)
120sec x20 @ISO800, AND 30sec x20 @ISO1600. Optolong L-Pro. DSLR. sn-10 OTA.
