Omega Carinae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 13m 44.21739s |
| Declination | −70° 02′ 16.4563″ |
| Apparent magnitude (V) | 3.29 |
| Characteristics | |
| Spectral type | B8 IIIe |
| U−B color index | −0.285 |
| B−V color index | −0.083 |
| Astrometry | |
| Radial velocity (Rv) | +7.0 km/s |
| Proper motion (μ) | RA: -36.01 mas/yr Dec.: +7.09 mas/yr |
| Parallax (π) | 9.54±0.09 mas |
| Distance | 342 ± 3 ly (104.8 ± 1.0 pc) |
| Absolute magnitude (MV) | −1.81 |
| Details | |
| Mass | 4.9 M☉ |
| Radius | 7.20±0.14 R☉ |
| Luminosity | 918 L☉ |
| Surface gravity (log g) | 3.51 cgs |
| Temperature | 11,630 K |
| Rotational velocity (v sin i) | 240 km/s |
| Other designations | |
| ω Car, CD−69°1178, FK5 385, HD 89080, HIP 50099, HR 4037, SAO 250885 | |
| Database references | |
| SIMBAD | data |
Omega Carinae, Latinized from ω Carinae, is a star in the constellation Carina. With a declination greater than 70 degrees south of the celestial equator, it is the most southerly of the bright stars of Carina (third-magnitude or brighter), and it is part of a southern asterism known as the Diamond Cross. This star has an apparent visual magnitude of 3.3 and is located at a distance of about 342 light-years (105 parsecs) from Earth.