Gamma Canis Majoris
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 07h 03m 45.493s |
| Declination | −15° 37′ 59.83″ |
| 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: −0.931 mas/yr Dec.: −11.435 mas/yr |
| Parallax (π) | 7.5819±0.1868 mas |
| Distance | 430 ± 10 ly (132 ± 3 pc) |
| Absolute magnitude (MV) | −1.4 |
| Details | |
| Mass | 4.15±0.06 M☉ |
| Radius | 6.08±0.17 R☉ |
| Luminosity | 537±25 L☉ |
| Surface gravity (log g) | 3.51±0.02 cgs |
| Temperature | 11,732+38 −40 K |
| Metallicity [Fe/H] | −0.24 dex |
| Rotation | 6.214 days |
| Rotational velocity (v sin i) | 30 km/s |
| Other designations | |
| Muliphein, Muliphen, γ Canis Majoris, 23 Canis Majoris, BD−15°1625, FK5 271, GC 9320, HD 53244, HIP 34045, HR 2657, SAO 152303 | |
| Database references | |
| SIMBAD | data |
Gamma Canis Majoris is a blue-white star in the constellation of Canis Major. Its name is a Bayer designation; it has the proper name Muliphein, pronounced /ˈmjuːlɪfeɪn/. With an apparent visual magnitude of +4.10, it is faintly visible to the naked eye. The reason why this relatively faint star was given the 'gamma' designation is uncertain, but possibly because it is in the same part of the constellation as Sirius (alpha) and Mirzam (beta). Based on parallax measurements, it is located at a distance of 430 light-years (132 pc) from the Earth. It is drifting further away with a line of sight velocity of +32 km/s.