| NGC 5662 | |
| Type: | Open Cluster |
| Epoch: | J2000 |
| Constellation: | Centaurus |
| Ra: | [1] |
| Dist Ly: | 2,170 ly |
| Dist Pc: | 666 pc[2] |
| Appmag V: | 5.5 |
| Size V: | 12' |
| Mass Msol: | 348[3] |
| Age: | 93 million years |
| Names: | Melotte 127, Colinder 284, vdBH 162 |
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.
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]