| NGC 6366 | |
|---|---|
 NGC 6366 as seen through theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Class | XI |
| Constellation | Ophiuchus |
| Right ascension | 17h 27m 44.3s |
| Declination | −05° 04′ 36″ |
| Apparent magnitude (V) | 9.5 |
| Apparent dimensions (V) | 13.0' |
| Physical characteristics | |
| Absolute magnitude | -5.47 |
| Metallicity | [Fe/H] = = −0.60±0.03[1]dex |
| Other designations | GCL 65 |
| See also:Globular cluster,List of globular clusters | |
NGC 6366 is aglobular cluster located in the constellationOphiuchus. It is designated asXI in theShapley–Sawyer Concentration Class and was discovered by the German astronomerFriedrich August Theodor Winnecke on 12 April 1860.[2] It is at a distance of 11,700 light years away from Earth.[3][4][5][6]
NGC 6366 is similar in composition toM 71 orNGC 6342.[7] It is metal-rich for a globular cluster, and all of its stars appears to have formed in the same epoch.[1]
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