21 Canum Venaticorum

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21 Canum Venaticorum
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canes Venatici
Right ascension 13h 18m 14.5s
Declination +49° 40′ 55″
Apparent magnitude (V) +5.14
Distance275 ± 15 ly
(84 ± 4 pc)
Spectral typeA0 V
Other designations
BK Canum Venaticorum, BD+50°1994, FK5 3063, HD 115735, HIP 64906, HR 5023, SAO 44556

21 Canum Venaticorum is a star in the constellation Canes Venatici.

21 Canum Venaticorum is a white A-type main sequence dwarf with a mean apparent magnitude of +5.14. It is approximately 275 light years from Earth. It is classified as an Alpha2 Canum Venaticorum type variable star and its brightness varies by 0.04 magnitudes.

This star has 2.55 times the mass of the Sun and 2.8 times the Sun's radius. It is radiating 63 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 9,772 K.[1]


  1. ^ North, P. (June 1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics, 334: 181–187, arXiv:astro-ph/9802286Freely accessible, Bibcode:1998A&A...334..181N