HD 95370

From Wikipedia the free encyclopedia

This article is about i Velorum. For I Velorum, see HD 81848. For J Velorum, see HD 89890. For l Velorum, see HD 79917. For L Velorum, see HD 83058.
HD 95370
Observation data
Epoch J2000      Equinox J2000
Constellation Vela
Right ascension 11h 00m 09.2642s[1]
Declination −42° 13′ 33.0904″[1]
Apparent magnitude (V) 4.37[2]
Characteristics
Spectral type A3 V[3]
B−V color index 0.116±0.005[2]
Astrometry
Radial velocity (Rv)−3.50±0.50[2] km/s
Proper motion (μ) RA: 23.077(64) mas/yr[1]
Dec.: 3.942(88) mas/yr[1]
Parallax (π)16.2011 ± 0.1139 mas[1]
Distance201 ± 1 ly
(61.7 ± 0.4 pc)
Absolute magnitude (MV)0.47[2]
Details[4]
Mass2.01 M☉
Radius2.6[5] R☉
Luminosity54.77[2] L☉
Surface gravity (log g)3.72±0.14 cgs
Temperature8,696±296 K
Rotational velocity (v sin i)115[6] km/s
Age548 Myr
Other designations
i Vel, CD−41° 6276, FK5 415, HD 95370, HIP 53773, HR 4293, SAO 222487[7]
Database references
SIMBADdata

HD 95370 is a single[8] star in the southern constellation of Vela. With an apparent visual magnitude of 4.37,[2] it can be viewed with the naked eye. The distance to this star can be determined from its annual parallax shift of 16.2 mas,[1] yielding a value of 201 light years. It is moving closer to the Earth with a heliocentric radial velocity of −3.5 km/s.[2]

According to Houk (1978), this is an A-type main-sequence star with a stellar classification of A3 V.[3] However, Levato (1972) listed a class of A3 IV, which may suggest it is instead a more evolved subgiant star. It is 548 million years[4] years old with a high projected rotational velocity of 115 km/s, giving it an oblate shape with an equatorial bulge that is 5% larger than the polar radius.[6] HD 95370 has double[4] the mass of the Sun and 2.6[5] times the Sun's radius. It is radiating 55[2] times the Sun's luminosity from its photosphere at an effective temperature of 8,696 K.[4]

References

[edit]
  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ 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.
  3. ^ 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.
  4. ^ a b c d David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
  5. ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  6. ^ a b van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review, 20 (1): 51, arXiv:1204.2572, Bibcode:2012A&ARv..20...51V, doi:10.1007/s00159-012-0051-2, S2CID 119273474.
  7. ^ "HD 95370". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-13.
  8. ^ 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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