HD 157662

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°.[6]

HD 157662
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension  17h 27m 12.46093s[1]
Declination −50° 37′ 49.3379″[1]
Apparent magnitude (V) 5.905[2]
Characteristics
Spectral type B9II[3]
U−B color index +0.055[4]
B−V color index +0.105[4]
Astrometry
Radial velocity (Rv)+11.0[5] km/s
Proper motion (μ) RA: +0.19[1] mas/yr
Dec.: −2.53[1] mas/yr
Parallax (π)1.10 ± 0.38[1] mas
Distanceapprox. 3,000 ly
(approx. 900 pc)
Details
Mass7.87±1.68[2] M☉
Luminosity8,214[2] L☉
Temperature10,650[2] K
Other designations
CD-50° 11283, HD 157662, HIP 85409, HR 6478, SAO 244755.
Database references
SIMBADdata

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355
  3. 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
  4. Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
  5. Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W
  6. Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22


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