Astronomy:HD 90853
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 27m 52.72877s[1] |
| Declination | −58° 44′ 21.8507″[1] |
| Apparent magnitude (V) | 3.81[2] |
| Characteristics | |
| Spectral type | F2II[3] or F0Ib[4] |
| B−V color index | 0.317±0.019[2] |
| Astrometry | |
| Radial velocity (Rv) | +9.4±0.7[2] km/s |
| Proper motion (μ) | RA: −14.47[1] mas/yr Dec.: +2.36[1] mas/yr |
| Parallax (π) | 2.43 ± 0.12[1] mas |
| Distance | 1,340 ± 70 ly (410 ± 20 pc) |
| Absolute magnitude (MV) | −4.44[2] |
| Details | |
| Mass | 7.00±0.55[5] M☉ |
| Radius | 45.05+3.74 −4.03[6] R☉ |
| Luminosity | 3,466±392[6] L☉ |
| Surface gravity (log g) | 1.50[7] cgs |
| Temperature | 6,598+317 −258[6] K |
| Metallicity [Fe/H] | −0.37[7][2] dex |
| Rotational velocity (v sin i) | 22.0[7] km/s |
| Age | 100[7] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 90853 is a single[9] star in the southern constellation Carina. It has the Bayer designation s Carinae, while HD 98053 is the identifier from the Henry Draper catalogue. This is a variable star with an apparent visual magnitude that ranges from 3.36 down to 3.51,[10] and thus is bright enough to be visible to the naked eye. It is located at a distance of approximately 1,340 light-years from the Sun based on parallax, and has an absolute magnitude of −4.44.[2] The star is drifting further away with a radial velocity of +9 km/s.[2]
This is an aging bright giant or supergiant star that has been assigned stellar classifications of F2II[3] and F0Ib,[4] respectively. It has seven[5] times the mass of the Sun and has expanded to 45[6] times the Sun's radius. It is spinning with a projected rotational velocity of 22 km/s.[7] The star is radiating 3,466[6] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 6,598 K.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 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 Malaroda, S. (August 1975). "Study of the F-type stars. I. MK spectral types". Astronomical Journal 80: 637–641. doi:10.1086/111786. Bibcode: 1975AJ.....80..637M.
- ↑ 4.0 4.1 van der Wal, S. E.; van Genderen, A. M. (April 1988). "VBLUW-photometry of the two FO Ib supergiants HD 80404 and HD 90853 and the K5 Ib supergiant HD 85891 with its associated cluster.". Astronomy and Astrophysics 195: 172–178. Bibcode: 1988A&A...195..172V.
- ↑ 5.0 5.1 Hohle, M. M. et al. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten 331 (4): 349–360. doi:10.1002/asna.200911355. Bibcode: 2010AN....331..349H.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 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.
- ↑ 7.0 7.1 7.2 7.3 7.4 Mallik, Sushma V. et al. (October 2003). "Lithium and rotation in F and G dwarfs and subgiants". Astronomy and Astrophysics 409: 251–261. doi:10.1051/0004-6361:20031084. Bibcode: 2003A&A...409..251M.
- ↑ "HD 90853". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+90853.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E.
- ↑ Samus, N. N. et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1 61 (1): 80–88. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S.
Coordinates: 
10h 27m 52.7s, −58° 44′ 22″
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