Gamma Canis Majoris
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 07h 03m 45.49305s |
| Declination | −15° 37′ 59.8300″ |
| Apparent magnitude (V) | +4.10 |
| Characteristics | |
| Spectral type | B8II |
| U−B color index | −0.45 |
| B−V color index | −0.13 |
| Astrometry | |
| Radial velocity (Rv) | +32.0 km/s |
| Proper motion (μ) | RA: −0.14 mas/yr Dec.: −11.36 mas/yr |
| Parallax (π) | 7.38±0.21 mas |
| Distance | 440 ± 10 ly (136 ± 4 pc) |
| Absolute magnitude (MV) | −1.4 |
| Details | |
| Radius | 5.205 R☉ |
| Luminosity | 750 L☉ |
| Surface gravity (log g) | 3.5 cgs |
| Temperature | 13,200 K |
| Metallicity [Fe/H] | −0.24 dex |
| Rotation | 6.214 days |
| Rotational velocity (v sin i) | 30 km/s |
| Other designations | |
| Muliphein, Muliphen, 23 Canis Majoris, BD−15°1625, FK5 271, HD 53244, HR 2657, HIP 34045, SAO 152303 | |
| Database references | |
| SIMBAD | data |
Gamma Canis Majoris (γ Canis Majoris, abbreviated Gamma CMa, γ CMa), also named Muliphein /ˈmjuːlɪfeɪn/, is a star in the constellation of Canis Major. It is unclear exactly why this relatively faint star was given the 'gamma' designation, but possibly because it is in the same part of the constellation as Sirius (alpha) and Mirzam (beta).