HD 90853

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 article is about s Carinae. For S Carinae, see HD 88366.
HD 90853
Observation data
Epoch J2000.0      Equinox J2000.0
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
Distance1,340 ± 70 ly
(410 ± 20 pc)
Absolute magnitude (MV)−4.44[2]
Details
Mass7.00±0.55[5] M☉
Radius45.05+3.74
−4.03[6] R☉
Luminosity3,466±392[6] L☉
Surface gravity (log g)1.50[7] cgs
Temperature6,598+317
−258[6] K
Metallicity [Fe/H]−0.37[7][2] dex
Rotational velocity (v sin i)22.0[7] km/s
Age100[7] Myr
Other designations
s Car, NSV 4869, CD−58°2227, FK5 393, GC 14388, HD 90853, HIP 51232, HR 4114, SAO 238085[8]
Database references
SIMBADdata

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. 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.
  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.
  3. Malaroda, S. (August 1975). "Study of the F-type stars. I. MK spectral types". Astronomical Journal. 80: 637–641. Bibcode:1975AJ.....80..637M. doi:10.1086/111786.
  4. 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. Hohle, M. M.; et al. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349–360. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355.
  6. 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. Gaia DR2 record for this source at VizieR.
  7. Mallik, Sushma V.; et al. (October 2003). "Lithium and rotation in F and G dwarfs and subgiants". Astronomy and Astrophysics. 409: 251–261. Bibcode:2003A&A...409..251M. doi:10.1051/0004-6361:20031084.
  8. "HD 90853". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-26.
  9. 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. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
  10. Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.

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