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- Messier_12 abstract "Messier 12 or M 12 (also designated NGC 6218) is a globular cluster in the constellation of Ophiuchus. It was discovered by the French astronomer Charles Messier on May 30, 1764, who described it as a "nebula without stars". In dark conditions this cluster can be faintly seen with a pair of binoculars. Resolving the stellar components requires a telescope with an aperture of 8 in (20 cm) or greater. In a 10 in (25 cm) scope, the granular core shows a diameter of 3′ (arcminutes) surrounded by a 10′ halo of stars.Located roughly 3° in the sky from the cluster M10 and 5.6° from the star Lambda Ophiuchi, M12 is about 15,700 light-years (4,800 parsecs) from Earth and has a spatial diameter of about 75 light-years. The brightest stars of M12 are of 12th magnitude. With a Shapley-Sawyer rating of IX, 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.".
- Messier_12 thumbnail M12_Hubble.jpg?width=300.
- Messier_12 wikiPageExternalLink cluster_4.php?ggc=M+12.
- Messier_12 wikiPageExternalLink m012.html.
- Messier_12 wikiPageExternalLink past_globular_m12.html?822006.
- Messier_12 wikiPageID "943678".
- Messier_12 wikiPageRevisionID "601561947".
- Messier_12 age "12.67".
- Messier_12 appmagV "+7.68".
- Messier_12 caption "M12 core by HST, 3.18′ view".
- Messier_12 class "IX".
- Messier_12 constellation Ophiuchus.
- Messier_12 epoch Epoch_(astronomy).
- Messier_12 hasPhotoCollection Messier_12.
- Messier_12 metalFe "–1.14".
- Messier_12 name "Messier 12".
- Messier_12 names "NGC 6218".
- Messier_12 radiusLy "37.2".
- Messier_12 sizeV "16".
- Messier_12 subject Category:Globular_clusters.
- Messier_12 subject Category:Messier_objects.
- Messier_12 subject Category:NGC_objects.
- Messier_12 subject Category:Objects_within_100_kly_of_Earth.
- Messier_12 subject Category:Ophiuchus_(constellation).
- Messier_12 comment "Messier 12 or M 12 (also designated NGC 6218) is a globular cluster in the constellation of Ophiuchus. It was discovered by the French astronomer Charles Messier on May 30, 1764, who described it as a "nebula without stars". In dark conditions this cluster can be faintly seen with a pair of binoculars. Resolving the stellar components requires a telescope with an aperture of 8 in (20 cm) or greater.".
- Messier_12 label "Cúmulo globular M12".
- Messier_12 label "M 12 (шаровое скопление)".
- Messier_12 label "M12 (amas globulaire)".
- Messier_12 label "M12 (astronomia)".
- Messier_12 label "M12 (天体)".
- Messier_12 label "M12 (球狀星團)".
- Messier_12 label "Messier 12".
- Messier_12 label "Messier 12".
- Messier_12 label "Messier 12".
- Messier_12 label "Messier 12".
- Messier_12 label "Messier 12".
- Messier_12 label "مسييه 12".
- Messier_12 sameAs Messier_12.
- Messier_12 sameAs Messier_12.
- Messier_12 sameAs Μεσιέ_12.
- Messier_12 sameAs Cúmulo_globular_M12.
- Messier_12 sameAs M12_(amas_globulaire).
- Messier_12 sameAs Messier_12.
- Messier_12 sameAs M12_(astronomia).
- Messier_12 sameAs M12_(天体).
- Messier_12 sameAs 메시에_12.
- Messier_12 sameAs Messier_12.
- Messier_12 sameAs Messier_12.
- Messier_12 sameAs Messier_12.
- Messier_12 sameAs m.03s1kd.
- Messier_12 sameAs Q11307.
- Messier_12 sameAs Q11307.
- Messier_12 wasDerivedFrom Messier_12?oldid=601561947.
- Messier_12 depiction M12_Hubble.jpg.
- Messier_12 isPrimaryTopicOf Messier_12.
