HD_91190

HD 91190

HD 91190

Star in the constellation Draco

HD 91190 is a suspected astrometric binary[7] star system in the northern circumpolar constellation of Draco. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.86.[2] The distance to HD 91190, as estimated from its annual parallax shift of 4.5 mas,[1] is around 720 light years. This system is moving further away from the Sun with a heliocentric radial velocity of +17 km/s,[4] having come to within 170 ly some 2.4 million years ago.[2]

Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...

At the age of about two billion years,[4] this is an evolved G-type giant star with a stellar classification of G8 III-IIIb.[3] It has 2.39[4] times the mass of the Sun and is radiating 69[4] times the Sun's luminosity from its photosphere at an effective temperature of around 4,965 K.[4]

References

  1. [1]
    Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  2. [2]
    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.
  3. [3]
    Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
  4. [4]
    Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal, 150 (3): 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114, 88.
  5. [5]
    Liu, Y. J.; et al. (April 2014), "The Lithium Abundances of a Large Sample of Red Giants", The Astrophysical Journal, 785 (2): 12, arXiv:1404.1687, Bibcode:2014ApJ...785...94L, doi:10.1088/0004-637X/785/2/94, S2CID 119226316, 94.
  6. [6]
    "HD 91190". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-17.
  7. [7]
    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.
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