HD 90853
HD 90853 is a single 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, 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. The star is drifting further away with a radial velocity of +9 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 27m 52.72877s |
| Declination | −58° 44′ 21.8507″ |
| Apparent magnitude (V) | 3.81 |
| Characteristics | |
| Spectral type | F2II or F0Ib |
| B−V color index | 0.317±0.019 |
| Astrometry | |
| Radial velocity (Rv) | +9.4±0.7 km/s |
| Proper motion (μ) | RA: −14.47 mas/yr Dec.: +2.36 mas/yr |
| Parallax (π) | 2.43 ± 0.12 mas |
| Distance | 1,340 ± 70 ly (410 ± 20 pc) |
| Absolute magnitude (MV) | −4.44 |
| Details | |
| Mass | 7.00±0.55 M☉ |
| Radius | 45.05+3.74 −4.03 R☉ |
| Luminosity | 3,466±392 L☉ |
| Surface gravity (log g) | 1.50 cgs |
| Temperature | 6,598+317 −258 K |
| Metallicity [Fe/H] | −0.37 dex |
| Rotational velocity (v sin i) | 22.0 km/s |
| Age | 100 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an aging bright giant or supergiant star that has been assigned stellar classifications of F2II and F0Ib, respectively. It has seven times the mass of the Sun and has expanded to 45 times the Sun's radius. It is spinning with a projected rotational velocity of 22 km/s. The star is radiating 3,466 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 6,598 K.