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NGC 5662 is an open cluster in the constellation Centaurus. It was discovered by Nicolas Louis de Lacaille on May 17, 1752 from South Africa.[4] James Dunlop observed it on July 10, 1826 from Parramatta, Australia and added it to his catalog as No. 342.[5]
| NGC 5662 | |
|---|---|
| Observation data (J2000 epoch) | |
| Right ascension | 14h 35m 37s[1] |
| Declination | −56° 37′ 06″[1] |
| Distance | 2,170 ly (666 pc[2]) |
| Apparent magnitude (V) | 5.5 [1] |
| Apparent dimensions (V) | 12' |
| Physical characteristics | |
| Mass | 348[3] M☉ |
| Estimated age | 93 million years[2] |
| Other designations | Melotte 127, Colinder 284, vdBH 162 |
| Associations | |
| Constellation | Centaurus |
It is a rich cluster (Trumpler class II3r), with 295 stars according to Haug (1978) and 280 according with Archinal, Hynes (2003).[5] One of its members, V Centauri, is a cepheid variable. Despite its large distance from the cluster centre, it has high likelihood of being a member of it.[6] The tidal radius of the cluster is 6.4 - 12.4 parsecs (21 - 40 light years) and represents the average outer limit of NGC 5662, beyond which a star is unlikely to remain gravitationally bound to the cluster core.[3]
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