Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Canes Venatici |
Right ascension | 12h 24m 01.49461s[1] |
Declination | +51° 33′ 44.1151″[1] |
Apparent magnitude (V) | +4.767[2] |
Characteristics | |
Evolutionary stage | giant |
Spectral type | G7 III Ba0.3[3] |
B−V color index | 0.868[2] |
Astrometry | |
Radial velocity (Rv) | −13.9[2] km/s |
Proper motion (μ) | RA: +12.769[1] mas/yr Dec.: +11.904[1] mas/yr |
Parallax (π) | 8.6983 ± 0.1637 mas[1] |
Distance | 375 ± 7 ly (115 ± 2 pc) |
Absolute magnitude (MV) | −0.68[4] |
Details | |
Mass | 2.96[2] M☉ |
Radius | 12[5] R☉ |
Luminosity | 174[2] L☉ |
Surface gravity (log g) | 2.60[4] cgs |
Temperature | 5,098±75[2] K |
Metallicity [Fe/H] | +0.01[4] dex |
Rotational velocity (v sin i) | 6.6[6] km/s |
Age | 530[2] Myr |
Other designations | |
Database references | |
SIMBAD | data |
5 Canum Venaticorum is a probable binary star[8] system in the northern constellation of Canes Venatici, located about 375 light years from the Sun.[1] It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of +4.77.[2] The system is moving closer to the Earth with a heliocentric radial velocity of −14 km/s.[2]
The visible component is an evolved G-type giant star with a stellar classification of G7 III Ba0.3.[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.[8] The primary is 530[2] million years old with 2.96[2] times the mass of the Sun and has expanded to about 12[5] times the Sun's radius. It is radiating 174[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,098 K.[2]
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).[9]