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Binary star system in the constellation Vela
This article is about B Velorum. For b Velorum, see
HD 74180 .
HD 70930 is a binary star [ 8] constellation of Vela . It has the Bayer designation B Velorum , while HD 70930 is the star's identifier in the Henry Draper catalogue apparent visual magnitude of 4.79,[ 2] light years based on parallax ,[ 1] absolute magnitude of −3.74.[ 2] Sun with a radial velocity of about +27 km/s.[ 2] [ 9]
The double nature of this system was discovered in 1896 by Scottish astronomer Robert T. A. Innes [ 3] spectroscopic binary .[ 10] [ 3] stellar classifications of B1V[ 4] [ 5] B-type main-sequence star or a giant star , respectively. It is a massive object – over 15 times the mass of the Sun – and is around 10 million years old.[ 4] projected rotational velocity of 169 km/s.[ 6] angular separation of ″ position angle of 139°, as of 2008.[ 3]
^ a b c d e f 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 Vizier catalog entry ^ a b c d e f g h Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331, arXiv :1108.4971 Bibcode :2012AstL...38..331A , doi :10.1134/S1063773712050015 , S2CID 119257644 . ^ a b c d e 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 ^ a b c d e Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society , 410 (1): 190–200, arXiv :1007.4883 Bibcode :2011MNRAS.410..190T , doi :10.1111/j.1365-2966.2010.17434.x S2CID 118629873 . ^ a b 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 Uesugi, Akira; Fukuda, Ichiro (1970), "Catalogue of rotational velocities of the stars", Contributions from the Institute of Astrophysics and Kwasan Observatory , University of Kyoto, Bibcode :1970crvs.book.....U . ^ "HD 70930" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2019-10-06 .^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems" . Monthly Notices of the Royal Astronomical Society . 389 (2): 869. arXiv :0806.2878 Bibcode :2008MNRAS.389..869E . doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 . ^ de Zeeuw, P. T.; et al. (January 1999), "A HIPPARCOS Census of the Nearby OB Associations", The Astronomical Journal , 117 (1): 354–399, arXiv :astro-ph/9809227 Bibcode :1999AJ....117..354D , doi :10.1086/300682 , S2CID 16098861 . ^ Chini, R.; et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society , 424 (3): 1925–1929, arXiv :1205.5238 Bibcode :2012MNRAS.424.1925C , doi :10.1111/j.1365-2966.2012.21317.x S2CID 119120749 .
