| NGC 6355 | |
|---|---|
 | |
| Observation data (J2000epoch) | |
| Constellation | Ophiuchus |
| Right ascension | 17h 23m 58.6s[1][2] |
| Declination | −26° 21′ 12″[1] |
| Distance | 8.54 ± 0.19 kpc (27.85 ± 0.62 kly)[3] |
| Apparent magnitude (V) | 8.6[4] |
| Apparent dimensions (V) | 4.20[4] |
| Physical characteristics | |
| Absolute magnitude | -8.07 |
| Metallicity | [Fe/H] = −1.39 ± 0.08[3]dex |
| Estimated age | 13.2 ± 1.1 Gyr[3] |
| Other designations | Cr 330, GCL 63 and ESO 519-SC15 |
| See also:Globular cluster,List of globular clusters | |
NGC 6355 is aglobular cluster located in the constellationOphiuchus.[5] It is at a distance of 28,000 light years away from Earth, and is currently part of theGalactic bulge.[3]
NGC was discovered by the German-born British astronomerWilliam Herschel on 24 May 1784.[6] It was initially thought to be anopen cluster, but its true nature as a globular cluster was later confirmed. It is acore-collapse cluster.[3]
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