21 Canum Venaticorum

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21 Canum Venaticorum
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 13h 18m 14.50967s[1]
Declination +49° 40′ 55.4245″[1]
Apparent magnitude (V) +5.14[2]
Characteristics
Spectral type B9 IV (Si)[3] or A0 V Si:[4]
B−V color index −0.049±0.002[2]
Variable type α2 CVn[5]
Distance
277 ± 3 ly
(85.1 ± 1.0 pc)
Absolute magnitude (MV)0.48[6]
Details
Myr
HR 5023, SAO 44556[8]
Database references
SIMBADdata

21 Canum Venaticorum is a single

apparent visual magnitude of +5.14.[2]

According to Garrison et al. (1994)

absorption lines and displaying helium line variability.[11] The widths of the lines of ionized silicon vary with a period of 21.12 ± 0.48 hours.[12]

21 Canum Venaticorum is classified as an

projected rotational velocity of 96 km/s.[7] The star has 2.73[7] times the mass of the Sun and 2.8[6] times the Sun's radius. It is radiating 72[2] times the luminosity of the Sun from its photosphere at an effective temperature of 11,036 K.[7]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119257644
    .
  3. ^
    doi:10.1086/116967
    .
  4. ^
    doi:10.1086/110819
    .
  5. ^
    S2CID 125853869
    , retrieved 2019-01-27.
  6. ^
    Bibcode:1998A&A...334..181N
  7. ^
    S2CID 33401607
    .
  8. ^ "21 CVn". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-27.
  9. S2CID 14878976
    .
  10. Bibcode:1994A&A...283..932Z
    .
  11. Bibcode:1984BAICz..35..294Z
    .
  12. Bibcode:2004BASI...32..113S
    .
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