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Messier 13 |
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 | M13, or NGC6205, is sometimes called the Great Globular in Hercules, as it is one of the most noticeable globular clusters in the northern hemisphere. About 22,000 light-years away and about 150 light-years across, M13 contains perhaps as many as a million stars. It is slightly closer and a little older than its near neighbor M92. M13 stands out as a bright, non-stellar smudge in 7x50s binoculars M13 grows gradually much brighter toward the middle, with a hint of a tight core. The apparent size in 7x50 binoculars is a bit over 10' of arc, put M13 at about mag 5.5. In a 8-inch scope, M13 appeared as a large, bright and round ball of light at 49X with good resolution around the edges, espescially on the S and SW side of the cluster. At higher powers M13 is a blazing ball of light fully resolved into stars right across the core, with a bright background of light from unresolved fainter stars. Also M13 is not exactly round and there seems to be a sharp edge on the North side. |
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Great Cluster in Hercules Hercules Globular Cluster M13 NGC 6205 Other description: Globular cluster highly resolved. Constellation: Hercules Dreyer description: Very remarkable! Globular cluster, extremely bright, very rich in stars, very gradually extremely compressed middle, stars of magnitude 11 and fainter; = M13. Magnitude: 5.9 RA: 16h 41m 52.5s Dec: +36°27'19" RA: 16h 41m 42.0s Dec: +36°28'00" (Epoch 2000) Azm: 234°54'45" Alt: +74°53'30" Rise: 14:02 Transit: 23:29 Set: 09:00 Size:16.6' |