Astronomy:HD 157662
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Short description: Star in the constellation Ara
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ara[1] |
| Right ascension | 17h 27m 12.46093s[2] |
| Declination | −50° 37′ 49.3379″[2] |
| Apparent magnitude (V) | 5.905[3] |
| Characteristics | |
| Spectral type | B9II[4] |
| U−B color index | +0.055[5] |
| B−V color index | +0.105[5] |
| Astrometry | |
| Radial velocity (Rv) | +11.0[6] km/s |
| Proper motion (μ) | RA: +0.19[2] mas/yr Dec.: −2.53[2] mas/yr |
| Parallax (π) | 1.10 ± 0.38[2] mas |
| Distance | approx. 3,000 ly (approx. 900 pc) |
| Details | |
| Mass | 7.87±1.68[3] M☉ |
| Luminosity | 8,214[3] L☉ |
| Temperature | 10,650[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 157662 is a bright giant star in the southern constellation of Ara. It has a magnitude 10.91 companion at an angular separation of 76.4″ along a position angle of 159°.[7]
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 3.2 3.3 Hohle, M. M. et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten 331 (4): 349, doi:10.1002/asna.200911355, Bibcode: 2010AN....331..349H
- ↑ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H
- ↑ 5.0 5.1 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M
- ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication (Carnegie Institute of Washington, D.C.), Bibcode: 1953GCRV..C......0W
- ↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22
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