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| Description of NGC 6218 |
Messier 12 (also known as M12, Globular Cluster M12 or NGC 6218) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier on May 30, 1764.
Located roughly 3 degrees from the cluster M10, M12 is about 16,000 light-years distant and has a spatial diameter of ~75 light-years. The brightest stars of M12 are of 12th magnitude. It is rather loosely packed for a globular and M12 was once thought to be a tightly concentrated open cluster. Thirteen variable stars have been recorded in this cluster.
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| DSS image |
Image of the cluster from the Digital Sky Survey |
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(1 link in the database at the moment) | Users comments for this cluster
(0 comments in the database at the moment) | Selected biblio  | | Paper n. 1 |
Sato, Takashi; Richer, Harvey B.; Fahlman, Gregory G.
Deep CCD photometry in globular clusters. VIII - M12
Astronomical Journal, vol. 98, Oct. 1989, p. 1335-1353
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(1 paper) |
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