NGC 643
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Rightascension01h 35m 01.43s[1]
Declination−75° 33′ 24.7″[1]
| NGC 643 | |
|---|---|
 NGC 643 with DECam | |
| Observation data (J2000 epoch) | |
| Right ascension | 01h 35m 01.43s[1] |
| Declination | −75° 33′ 24.7″[1] |
| Distance | ~200,000 ly |
| Apparent magnitude (V) | 13[2] |
| Apparent dimensions (V) | 1.50 arcmin[3] |
| Physical characteristics | |
| Other designations | ESO 29-SC50 |
| Associations | |
| Constellation | Hydrus |
NGC 643 is an open cluster located on the far outskirts of the Small Magellanic Cloud in the southern constellation of Hydrus, approximately 200,000 light-years from Earth.[1][3][4] Due to their close proximity to NGC 643, the open cluster ESO 29-SC44 and the galaxies PGC 6117 and PGC 6256 are also designated NGC 643A, NGC 643B and NGC 643C, respectively.[4] NGC 643 is relatively old. Its brightest stars have an apparent magnitude of 19.[2]
