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

Other versions

Previous/older images:

Apr 01, 2006 – Canon 20D (Orion USA 80/600 ED 30m)

Image data

Name M13 – The Hercules Globular Cluster
Type Globular cluster
Constellation Hercules
Right ascension 16h 41m 41s
Declination +36° 27′ 37″
Distance 22.200 ly
Other designations NGC6205