Omega Canis Majoris
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 07h 14m 48.654s |
| Declination | −26° 46′ 21.60″ |
| Apparent magnitude (V) | 3.60 to 4.18 |
| Characteristics | |
| Spectral type | B2.5Ve |
| U−B color index | −0.73 |
| B−V color index | −0.14 |
| Variable type | γ Cas |
| Astrometry | |
| Radial velocity (Rv) | 23.2±2.4 km/s |
| Proper motion (μ) | RA: −11.617 mas/yr Dec.: +8.109 mas/yr |
| Parallax (π) | 3.5610±0.1524 mas |
| Distance | 920 ± 40 ly (280 ± 10 pc) |
| Absolute magnitude (MV) | −3.21 |
| Details | |
| Mass | 10.1±0.7 M☉ |
| Radius | 6.2 R☉ |
| Luminosity | 13,081 L☉ |
| Surface gravity (log g) | 3.5 cgs |
| Temperature | 21,878 K |
| Rotational velocity (v sin i) | 80 km/s |
| Age | 22.5±2.6 Myr |
| Other designations | |
| ω CMa, 28 Canis Majoris, CD−26°4073, GC 9625, HD 56139, HIP 35037, HR 2749, SAO 173282 | |
| Database references | |
| SIMBAD | data |
Omega Canis Majoris is a solitary, blue-white-hued star in the equatorial constellation of Canis Major. Its name is a Bayer designation that is Latinized from ω Canis Majoris, and abbreviated Omega CMa or ω CMa. This star is visible to the naked eye with an apparent visual magnitude of about 4. Based upon an annual parallax shift of 3.56 mas as seen from Earth, this system is located roughly 920 light-years (280 pc) away from the Sun. It is drifting further away with a line of sight velocity of 23 km/s.