Astronomy:HD 95370
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Vela |
| Right ascension | 11h 00m 09.26378s[1] |
| Declination | −42° 13′ 33.0832″[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: +23.444[1] mas/yr Dec.: +3.462[1] mas/yr |
| Parallax (π) | 17.1959 ± 0.2681[1] mas |
| Distance | 190 ± 3 ly (58.2 ± 0.9 pc) |
| Absolute magnitude (MV) | 0.47[2] |
| Details[4] | |
| Mass | 2.01 M☉ |
| Radius | 2.6[5] R☉ |
| Luminosity | 54.77[2] L☉ |
| Surface gravity (log g) | 3.72±0.14 cgs |
| Temperature | 8,696±296 K |
| Rotational velocity (v sin i) | 115[6] km/s |
| Age | 548 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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 17.2 mas,[1] yielding a value of 190 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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H.
- ↑ 4.0 4.1 4.2 4.3 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, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ 5.0 5.1 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, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 6.0 6.1 van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review 20 (1): 51, doi:10.1007/s00159-012-0051-2, Bibcode: 2012A&ARv..20...51V.
- ↑ "HD 95370". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+95370.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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