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Ophiuchus

M107, Globular Cluster in Ophiuchus

Target Type R. A. Dec. Constellation Magnitude Size M107 (NGC 6171) Globular Cluster 16h 31m 32s -13° 03′ 14″ Ophiuchus +7.9 13.0 arcmin Overview Pierre Méchain discovered this loose globular cluster in April 1782, but it wasn’t added to Messier’s catalog until Helen Sawyer Hogg did so in 1947 based on the argument that Méchain …

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M62, Globular Cluster in Ophiuchus

Target Type R. A. Dec. Constellation Magnitude Size M62 (NGC 6266) Globular Cluster 17h 01m 13s -30° 06′ 49″ Ophiuchus +6.44 15.0 arcmin Overview Messier discovered this fabulously odd cluster in 1771. He described it as resembling a small comet. Today, we know that that’s because, unlike most globular clusters, M62 is asymmetrical. Even today, …

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M71, Globular Cluster in Sagitta

Target Type R. A. Dec. Constellation Magnitude Size M71 (NGC 6838) Globular Cluster 19h 53m 47s +18° 46′ 45″ Sagitta +8.18 3.3 arcmin Overview When is an open cluster not an open cluster? When it’s a globular cluster! M71 caused consternation once upon a time when astronomers couldn’t agree whether it was a loose globular …

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M12, Globular Cluster in Ophiuchus

Target Type R. A. Dec. Constellation Magnitude Size M12 (NGC 6218) Globular Cluster 16h 47m 18s -01° 56′ 55″ Ophiuchus +6.69 16.0 arcmin Overview There are many globular clusters in the constellation of Ophiuchus, and we’ve previously provided guides on seeing M9, M10, and M19 (go to the Messier Objects section to find them – …

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Globular Cluster in Ophiuchus, M9

Target Type R. A. Dec. Constellation Magnitude Size M9 (NGC 6333) Globular Cluster 17h 19m 11s +18° 30′ 57″ Ophiuchus +7.7 12.0 arcmins Overview Charles Messier discovered this globular cluster in 1764 and described by him as “a nebula without stars”. It lies on the edge of the Milky Way in a darker ribbon, making …

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