Messier 13

RA:

16:41:41.24

Dec:

+36:27:35.5

Distance from Sun:

23.1 kly

Distance from Galactic Center:

27.4 kly

Apparent Diameter:

20.0 arc min

Brightness:

5.78 mag vis

Radial Velocity:

-244.2 +/- 0.2 km/s

Diameter:

120 ly

Abs. Mag:

-8.55 Mag vis

M13, the Great Globular Cluster in Hercules, was discovered by Edmond Halley in 1714. 50 years later, Charles Messier cataloged it on June 1, 1764.

• More on M 13 (SEDS Messier Database)
• Catalog of Variable Stars in M13 (Christine Clement)