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With an apparent magnitude of 5.8, it is barely visible with the naked eye on a very clear night. Its diameter is about 23 arc minutes and it is readily viewable in small telescopes. M13 is about 145 light-years in diameter, and it is composed of several hundred thousand stars, the brightest of which is a red giant, the variable star V11, with an apparent visual magnitude of 11.95. M13 is 25,100 light-years away from Earth. Read more.
Name and aliases | M 13, NGC 6205 |
Common names | Hercules Globular Cluster |
Type | Globular Cluster |
Coordinates | 16:41:41.63 +36:27:40.7 |
Radial velocity | -244.4 km/s |
Link | Simbad |
Link | HyperLeda |
Messier 13