5 Canum Venaticorum
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canes Venatici |
| Right ascension | 12h 24m 01.49461s |
| Declination | +51° 33′ 44.1151″ |
| Apparent magnitude (V) | +4.767 |
| Characteristics | |
| Evolutionary stage | giant |
| Spectral type | G7 III Ba0.3 |
| B−V color index | 0.868 |
| Astrometry | |
| Radial velocity (Rv) | −13.9 km/s |
| Proper motion (μ) | RA: +12.769 mas/yr Dec.: +11.904 mas/yr |
| Parallax (π) | 8.6983±0.1637 mas |
| Distance | 375 ± 7 ly (115 ± 2 pc) |
| Absolute magnitude (MV) | −0.68 |
| Details | |
| Mass | 2.96 M☉ |
| Radius | 12 R☉ |
| Luminosity | 174 L☉ |
| Surface gravity (log g) | 2.60 cgs |
| Temperature | 5,098±75 K |
| Metallicity [Fe/H] | +0.01 dex |
| Rotational velocity (v sin i) | 6.6 km/s |
| Age | 530 Myr |
| Other designations | |
| 5 CVn, BD+52°1626, FK5 2994, GC 16906, HD 107950, HIP 60485, HR 4716, SAO 28366 | |
| Database references | |
| SIMBAD | data |
5 Canum Venaticorum is a probable binary star system in the northern constellation of Canes Venatici, located about 375 light years from the Sun. It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of +4.77. The system is moving closer to the Earth with a heliocentric radial velocity of −14 km/s.
The visible component is an evolved G-type giant star with a stellar classification of G7 III Ba0.3. The 'Ba0.3' suffix notation indicates this is a mild barium star, which means that the stellar atmosphere has been enhanced by s-process elements most likely provided by what is now an orbiting white dwarf companion. The primary is 530 million years old with 2.96 times the mass of the Sun and has expanded to about 12 times the Sun's radius. It is radiating 174 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,098 K.
In Chinese astronomy, 5 Canum Venaticorum is called 相, Pinyin: Xiāng, meaning Prime Minister, because this star is marking itself and stand alone in Prime Minister asterism, Purple Forbidden enclosure mansion (see : Chinese constellation).