HD 90853
Star in the southern constellation Carina
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HD 90853 is a single[9] star in the southern constellation Carina. It has the Bayer designation s Carinae, while HD 90853 is the identifier from the Henry Draper catalogue. This is a suspected variable star[10] with an apparent visual magnitude reported to vary between 3.79 and 3.83,[11] 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.[1] The star is drifting further away with a radial velocity of +9 km/s.[1]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina[1] |
| Right ascension | 10h 27m 52.72877s[2] |
| Declination | −58° 44′ 21.8507″[2] |
| Apparent magnitude (V) | 3.81[1] |
| Characteristics | |
| Spectral type | F2II[3] or F0Ib[4] |
| B−V color index | 0.317±0.019[1] |
| Astrometry | |
| Radial velocity (Rv) | +9.4±0.7[1] km/s |
| Proper motion (μ) | RA: −14.47[2] mas/yr Dec.: +2.36[2] mas/yr |
| Parallax (π) | 2.43±0.12 mas[2] |
| Distance | 1,340 ± 70 ly (410 ± 20 pc) |
| Absolute magnitude (MV) | −4.44[1] |
| 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][1] dex |
| Rotational velocity (v sin i) | 22.0[7] km/s |
| Age | 100[7] Myr |
| Other designations | |
| s Car, NSV 4869, AAVSO 1024-58C, CPD−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]