Beta Canum Venaticorum
Beta Canum Venaticorum (β Canum Venaticorum, abbreviated Beta CVn, β CVn), also named Chara /ˈkɛərə/, is a G-type main-sequence star in the northern constellation of Canes Venatici. At an apparent visual magnitude of 4.25, it is the second-brightest star in the constellation. Based upon an annual parallax shift of 118 mas, this star is 27.6 light-years (8.5 parsecs) distant from the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canes Venatici |
| Right ascension | 12h 33m 44.54425s |
| Declination | +41° 21′ 26.9214″ |
| Apparent magnitude (V) | 4.25 |
| Characteristics | |
| Spectral type | G0 V |
| U−B color index | 0.04 |
| B−V color index | 0.58 |
| Astrometry | |
| Radial velocity (Rv) | +6.9 km/s |
| Proper motion (μ) | RA: −704.702 mas/yr Dec.: +292.155 mas/yr |
| Parallax (π) | 118.0266 ± 0.1530 mas |
| Distance | 27.63 ± 0.04 ly (8.47 ± 0.01 pc) |
| Absolute magnitude (MV) | 4.64 |
| Details | |
| Mass | 0.97±0.04 M☉ |
| Radius | 1.123±0.028 R☉ |
| Luminosity | 1.151±0.018 L☉ |
| Surface gravity (log g) | 4.60 cgs |
| Temperature | 6043±183 K |
| Metallicity [Fe/H] | −0.18 dex |
| Rotational velocity (v sin i) | 2.9±0.4 km/s |
| Age | 3.4 to 7.1 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Along with the brighter star Cor Caroli, the pair form the "southern dog" in this constellation that represents hunting dogs.
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