Zeta Canis Majoris
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 20m 18.79204s |
| Declination | −30° 03′ 48.1202″ |
| Apparent magnitude (V) | +3.025 |
| Characteristics | |
| Spectral type | B2.5 V |
| U−B color index | −0.71 |
| B−V color index | −0.195 |
| Variable type | Suspected β Cep |
| Astrometry | |
| Radial velocity (Rv) | +32.2 km/s |
| Proper motion (μ) | RA: +7.32 mas/yr Dec.: +4.03 mas/yr |
| Parallax (π) | 9.00±0.13 mas |
| Distance | 362 ± 5 ly (111 ± 2 pc) |
| Absolute magnitude (MV) | −2.21 |
| Orbit | |
| Period (P) | 675 days |
| Eccentricity (e) | 0.57 |
| Periastron epoch (T) | 2,416,508 JD |
| Argument of periastron (ω) (secondary) | 207° |
| Semi-amplitude (K1) (primary) | 13.5 km/s |
| Details | |
| Mass | 7.7±0.2 M☉ |
| Radius | 5.72 R☉ |
| Luminosity | 3,603 L☉ |
| Surface gravity (log g) | 4.0 cgs |
| Temperature | 18,700 K |
| Rotational velocity (v sin i) | 25 km/s |
| Age | 32.0±0.4 Myr |
| Other designations | |
| Furud, Phurud, ζ CMa, Zeta CMa, 1 Canis Majoris, CD−30°3038, FK5 240, HD 44402, HIP 30122, HR 2282, SAO 196698 | |
| Database references | |
| SIMBAD | data |
Zeta Canis Majoris, or ζ Canis Majoris, also named Furud /ˈfjʊərəd/, is a binary star system in the southern constellation of Canis Major. This system has an apparent visual magnitude of +3.0, making it one of the brighter stars in the constellation and hence readily visible to the naked eye. Parallax measurements from the Hipparcos mission yield a distance estimate of around 362 ly (111 pc) from the Sun. It is drifting further away with a radial velocity of +32 km/s.