Omicron1 Canis Majoris
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 54m 07.9523s |
| Declination | −24° 11′ 03.160″ |
| Apparent magnitude (V) | 3.87 (3.78 - 3.99) |
| Characteristics | |
| Evolutionary stage | Red supergiant |
| Spectral type | K2.5 Iab |
| U−B color index | +1.99 |
| B−V color index | +1.73 |
| Variable type | Slow irregular variable (Lc) |
| Astrometry | |
| Radial velocity (Rv) | +36.3 km/s |
| Proper motion (μ) | RA: −3.771 mas/yr Dec.: 4.503 mas/yr |
| Parallax (π) | 1.2869±0.1209 mas |
| Distance | 2673±241 ly (820±74 pc) |
| Absolute magnitude (MV) | −4.69 |
| Details | |
| Mass | 7.83 ± 2.0 M☉ 14.38±2.88 M☉ 18 M☉ |
| Radius | 390 R☉ |
| Luminosity | 37,414 L☉ |
| Temperature | 4,015 K |
| Metallicity [Fe/H] | −0.11 dex |
| Rotational velocity (v sin i) | 12.31 km/s |
| Age | 18 Myr |
| Other designations | |
| 16 Canis Majoris, HR 2580, HD 50877, CD−24°4567, HIP 33152, SAO 172542, GC 9059 | |
| Database references | |
| SIMBAD | data |
Omicron1 Canis Majoris (ο1 CMa, ο1 Canis Majoris) is a red supergiant star in the constellation Canis Major. It is also a variable star.