Nu3 Canis Majoris
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 37m 53.421s |
| Declination | −18° 14′ 14.93″ |
| Apparent magnitude (V) | 4.41 (4.63 + 8.56) |
| Characteristics | |
| Evolutionary stage | horizontal branch |
| Spectral type | K0 II-III |
| U−B color index | +1.04 |
| B−V color index | +1.16 |
| Astrometry | |
| Radial velocity (Rv) | −1.50±0.70 km/s |
| Proper motion (μ) | RA: −7.166 mas/yr Dec.: −8.777 mas/yr |
| Parallax (π) | 6.7876±0.1054 mas |
| Distance | 481 ± 7 ly (147 ± 2 pc) |
| Absolute magnitude (MV) | −1.13 |
| Details | |
| ν3 CMa A | |
| Mass | 3.38±0.37 M☉ |
| Radius | 32.7 R☉ |
| Luminosity | 398 L☉ |
| Surface gravity (log g) | 2.34 cgs |
| Temperature | 4,510 K |
| Metallicity [Fe/H] | −0.24 dex |
| Rotation | 183 d |
| Rotational velocity (v sin i) | 8 km/s |
| Age | 380±20 Myr |
| Other designations | |
| HDS 915, ν3 CMa, 8 Canis Majoris, BD−18°1492, GC 8660, HD 47442, HIP 31700, HR 2443, SAO 151730, CCDM 06379-1814, WDS J06379-1814A | |
| Database references | |
| SIMBAD | data |
Nu3 Canis Majoris is a binary star system in the southern constellation of Canis Major. Its name is a Bayer designation that is Latinized from ν3 Canis Majoris, and abbreviated Nu3 CMa or ν3 CMa. The star system, appearing as one star, is deemed visible to the naked eye with its combined apparent visual magnitude of 4.41. Based upon an annual parallax shift of 6.79 mas as seen from Earth, this system is approximately 481 light-years (147 pc) distant from the Sun.