HD 90853

This article is about s Carinae. For S Carinae, see HD 88366.

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]

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 mas[1]
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
s Car, NSV 4869, CD−58°2227, FK5 393, GC 14388, HD 90853, HIP 51232, HR 4114, SAO 238085[8]
Database references
SIMBAD	data

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. S2CID 119257644.
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. S2CID 111387483.
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. S2CID 14878976.
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. S2CID 125853869.