Nu3 Canis Majoris
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 37m 53.42144s |
| Declination | −18° 14′ 14.9218″ |
| 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: −7.32 mas/yr Dec.: −8.72 mas/yr |
| Parallax (π) | 7.74±0.43 mas |
| Distance | 420 ± 20 ly (129 ± 7 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 | |
| ν3 CMa, 8 Canis Majoris, BD−18°1492, GC 8660, HD 47442, HIP 31700, HR 2443, SAO 151730, CCDM 06379-1814 | |
| Database references | |
| SIMBAD | data |
Nu3 Canis Majoris, Latinized from ν3 Canis Majoris, is a binary star system in the southern constellation of Canis Major.