Delta Canis Majoris
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 07h 08m 23.48608s |
| Declination | −26° 23′ 35.5474″ |
| Apparent magnitude (V) | 1.824 |
| Characteristics | |
| Spectral type | F8 Ia |
| U−B color index | +0.584 |
| B−V color index | +0.67 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | 34.3±0.9 km/s |
| Proper motion (μ) | RA: −3.12 mas/yr Dec.: +3.31 mas/yr |
| Parallax (π) | 2.03±0.38 mas |
| Distance | approx. 1,600 ly (approx. 490 pc) |
| Absolute magnitude (MV) | −6.77±0.41 |
| Details | |
| Mass | 14–15 M☉ |
| Radius | 188 R☉ |
| Luminosity | 34,600±6,600 L☉ |
| Surface gravity (log g) | 1.00±0.14 cgs |
| Temperature | 5,818±53 K |
| Metallicity [Fe/H] | 0.28 dex |
| Rotational velocity (v sin i) | 13.4±1.9 km/s |
| Age | 12 Myr |
| Other designations | |
| Wezen, Wesen, Wezea, Alwazn, Al Wazor, δ Canis Majoris, 25 Canis Majoris, CD−26°3916, FK5 273, HD 54605, HIP 34444, HR 2693, SAO 173047 | |
| Database references | |
| SIMBAD | data |
Delta Canis Majoris is a supergiant star in the constellation of Canis Major. It is formally named Wezen (/ˈwiːzən/); Delta Canis Majoris is its Bayer designation. At an apparent magnitude of +1.83, it is the third-brightest star in the constellation. Based on parallax measurements, it is located at a distance of approximately 1,600 light years. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.