Astronomy:NGC 5662
| NGC 5662 | |
|---|---|
| Observation data (J2000 epoch) | |
| Constellation | Centaurus |
| 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 |
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 . James Dunlop observed it on July 10, 1826 from Parramatta, Australia and added it to his catalog as No. 342.[4]
It is a rich cluster (Trumpler class II3r), with 295 stars according to Haug (1978) and 280 according with Archinal, Hynes (2003).[4] 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.[5] 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]
References
- ↑ 1.0 1.1 1.2 "NGC 5662". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+5662.
- ↑ 2.0 2.1 WEBDA: NGC 5662
- ↑ 3.0 3.1 Piskunov, A. E.; Schilbach, E.; Kharchenko, N. V.; Röser, S.; Scholz, R.-D. (6 November 2007). "Tidal radii and masses of open clusters". Astronomy & Astrophysics 477 (1): 165–172. doi:10.1051/0004-6361:20078525. Bibcode: 2008A&A...477..165P. ftp://cdsarc.u-strasbg.fr/pub/cats/J/A%2BA/477/165/table.dat.
- ↑ 4.0 4.1 Kronberg, Christine; Frommert, Hartmut. "NGC 5662". http://messier.seds.org/xtra/ngc/n5662.html.
- ↑ Anderson, Richard I.; Eyer, Laurent; Mowlavi, Nami (July 2013). "Cepheids in open clusters: an 8D all-sky census". Monthly Notices of the Royal Astronomical Society 434 (3): 2238–2261. doi:10.1093/mnras/stt1160. Bibcode: 2013MNRAS.434.2238A.
External links
- NGC 5662 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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