Beta Canum Venaticorum

β Canum Venaticorum
Location of β Canum Venaticorum (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 12h 33m 44.54425s[1]
Declination +41° 21′ 26.9214″[1]
Apparent magnitude (V) 4.25[2]
Characteristics
Spectral type G0 V[3]
U−B color index 0.04[4]
B−V color index 0.58[4]
Astrometry
Radial velocity (Rv)+6.9[5] km/s
Proper motion (μ) RA: −704.702[1] mas/yr
Dec.: +292.155[1] mas/yr
Parallax (π)118.0266 ± 0.1530 mas[1]
Distance27.63 ± 0.04 ly
(8.47 ± 0.01 pc)
Absolute magnitude (MV)4.64[6]
Details
Mass0.97±0.04[7] M☉
Radius1.03±0.03[8] R☉
Luminosity1.254±0.009[9] L☉
Surface gravity (log g)4.41±0.04[9] cgs
Temperature6013±91[9] K
Metallicity [Fe/H]−0.2±0.01[9] dex
Rotational velocity (v sin i)2.9±0.4[10] km/s
Age3.4[7] to 7.1[6] Gyr
Other designations
Chara, Asterion, Beta CVn, 8 CVn, BD +42 2321, FK5 470, HD 109358, HIP 61317, HR 4785, SAO 44230[11]
Database references
SIMBADdata
ARICNSdata

Beta Canum Venaticorum (β Canum Venaticorum, abbreviated Beta CVn, β CVn), also named Chara /ˈkɛərə/,[12][13] 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,[1] this star is 27.6 light-years (8.5 parsecs) distant from the Sun.

Along with the brighter star Cor Caroli, the pair form the "southern dog" in this constellation that represents hunting dogs.

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  12. ^ Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (2nd rev. ed.). Cambridge, Massachusetts: Sky Pub. ISBN 978-1-931559-44-7.
  13. ^ "IAU Catalog of Star Names". Retrieved 28 July 2016.