| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 54m 07.9526s |
| Declination | -24° 11′ 03.159″ |
| Apparent magnitude (V) | 3.851 |
| Characteristics | |
| Spectral type | K2.5Iab |
| U−B color index | +2.00 |
| B−V color index | +1.75 |
| Variable type | Pulsating |
| Astrometry | |
| Radial velocity (Rv) | +36.30 km/s |
| Proper motion (μ) | RA: -3.46 mas/yr Dec.: 5.02 mas/yr |
| Parallax (π) | 1.65 ± 0.62 mas |
| Distance | 1,975.75 ly (606.06 pc) |
| Absolute magnitude (MV) | -5.06 |
| Details | |
| Mass | 10-12 M☉ |
| Radius | 231 R☉ |
| Luminosity | 14,500(bolometric) L☉ |
| Temperature | 4,165 K |
| Metallicity | 0.75 (Fe/H) |
| Rotational velocity (v sin i) | < 19 km/s |
| Age | Unknown years |
| Other designations | |
Omicron1 Canis Majoris (ο1 CMa, ο1 Canis Majoris) is a star in the constellation Canis Major.
ο1 Canis Majoris is an orange K-type supergiant with a mean apparent magnitude of +3.89. It is approximately 1980 light years from Earth. It is classified as an irregular variable star and its brightness varies from magnitude +3.78 to +3.99.
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