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Messier 12 or M 12 (also designated NGC 6218) is a globular cluster in the constellation of Ophiuchus. It was discovered by Charles Messier on May 30, 1764.

Located roughly 3° in the sky from the cluster M10, M12 is about 16,000 light-years from Earth and has a spatial diameter of about 75 light-years. The brightest stars of M12 are of 12th magnitude. It is rather loosely packed for a globular and was once thought to be a tightly concentrated open cluster. Thirteen variable stars have been recorded in this cluster.

A study published in 2006 concluded that this cluster has an unusually low number of low mass stars. The authors surmise that they were stripped from the cluster by the gravitational influence of the Milky Way Galaxy.[1]

External linksEdit

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ReferencesEdit

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zh-min-nan:Messier 12 be:Аб'ект Месье M12ca:Messier 12 cs:Messier 12 co:M12eo:M12 fa:مسیه ۱۲ fr:M12 (amas globulaire) ko:M12 (천체) hr:Messier 12 it:M12 (astronomia) lt:Mesjė 12 hu:Messier 12 nl:Messier 12 ja:M12ro:Messier 12 ru:Шаровое скопление М12 sk:Hviezdokopa M12 fi:Messier 12 sv:M12 tr:Messier 12zh:M12 (球狀星團)

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