Astronomy:HD 157662

From HandWiki
Star in the constellation Ara
HD 157662
Observation data
Equinox J2000.0]] (ICRS)
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

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]

References

  1. 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode2007A&A...474..653V. 
  2. 2.0 2.1 2.2 2.3 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, Bibcode2010AN....331..349H 
  3. Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode1978mcts.book.....H 
  4. 4.0 4.1 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode1986EgUBV........0M 
  5. Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode1953GCRV..C......0W 
  6. Mason, B. D. et al. (2014), The Washington Visual Double Star Catalog, doi:10.1086/323920, Bibcode2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22 

External links