M13- the Hercules Globular Cluster ,is a star cluster in constellation Hercules,  Discovered by Edmond Halley in 1714  and cataloged by Charles Messier  on  june 1,1764 in the Messier Catalog .
Equipment astrophoto :
- telescope -MEADE 80mm triplet apo
-camera photo -Atik 314l+ mono
-mount -Skywatcher HEQ5Pro , guided
-filters- Astronomik -HA , Olll .
- exposures time - Light frames HA 15 x 300 sec. &  Olll 13 x 300 sec.

- Location Babadag -Romania -2 April-2020 . Mini-observatory ,,Scorpius" (with moon light pollution) .