M13, also known as the “Great Hercules Globular Cluster” is one of the most prominent and best known globular clusters of the Northern sky.
With an apparent magnitude of 5.8, it is just visible with the naked eye under good conditions.
Its diameter is about 145 light-years, and it is composed of several hundred thousand stars.
M13 is 25.100 light years away from Earth
Apr 01, 2006 – Canon 20D (Orion USA 80/600 ED 30m)
|Name||M13 – The Hercules Globular Cluster|
|Right ascension||16h 41m 41s|
|Declination||+36° 27′ 37″|