HD_157662 Knowpia

HD 157662
Observation data; Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17h 27m 12.46093s
Declination	−50° 37′ 49.3379″
Apparent magnitude (V)	5.905
Characteristics
Spectral type	B9II
U−B color index	+0.055
B−V color index	+0.105
Astrometry
Radial velocity (Rv)	+11.0 km/s
Proper motion (μ)	RA: +0.19 mas/yr ; Dec.: −2.53 mas/yr
Parallax (π)	1.10 ± 0.38 mas
Distance	approx. 3,000 ly ; (approx. 900 pc)
Details
Mass	7.87±1.68 M☉
Luminosity	8,214 L☉
Temperature	10,650 K
Other designations
	CD-50° 11283, HD 157662, HIP 85409, HR 6478, SAO 244755.
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°.^[6]

References edit

^ ^a ^b ^c ^d ^e 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. S2CID 18759600.
^ ^a ^b ^c ^d 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, S2CID 111387483
^ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H
^ ^a ^b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data.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, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22

Observation data Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17^h 27^m 12.46093^s^[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 (R_v)	+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 mas^[1]
Distance	approx. 3,000 ly (approx. 900 pc)

Details

Mass	7.87±1.68^[2] `M`_☉
Luminosity	8,214^[2] `L`_☉
Temperature	10,650^[2] K

Other designations
CD-50° 11283, HD 157662, HIP 85409, HR 6478, SAO 244755.
Database references
SIMBAD	data