Beta Comae Berenices

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Beta Comae Berenices

Location of β Coma Bernices (upper left)
Observation data
Epoch J2000      Equinox J2000
Constellation Coma Berenices
Right ascension 13h 11m 52.39379s[1]
Declination +27° 52′ 41.4535″[1]
Apparent magnitude (V) 4.26[2]
Characteristics
Spectral type G0 V[3]
U−B color index +0.08[2]
B−V color index +0.58[4]
Distance
29.95 ± 0.10 ly
(9.18 ± 0.03 pc)
Absolute magnitude (MV)4.46[7]
Details
Gyr
LTT 13815, SAO 82706.[13]
Database references
SIMBADdata
β Comae Berenices in optical light

Beta Comae Berenices (β Comae Berenices, β Com) is a

too dim
to be viewed from a built-up urban area.

The star is similar to the Sun, being only slightly larger and brighter in absolute magnitude. It has a stellar classification of G0 V,[3] compared to G2 V for the Sun. The effective temperature of the outer envelope is 5,936 K,[9] giving it a yellow hue of a G-type star.[14] In terms of age it is younger than the Sun, being about 3 billion years old.[12]

Observations of short term variations in the chromatic activity suggest that the star undergoes differential rotation,

dusty disk
.

The

AU, where 1 AU is the average distance from the Earth to the Sun.[17]

See also

References

  1. ^
    S2CID 18759600 Note: see VizieR catalogue I/311
    .
  2. ^
    Bibcode:1966CoLPL...4...99J
  3. ^
    doi:10.1086/319956
  4. ^
    Bibcode:1998A&A...338..623M
    .
  5. Bibcode:1953GCRV..C......0W
    .
  6. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  7. S2CID 118577511
    .
  8. S2CID 18775378. Note: see VizieR catalogue J/ApJS/168/297
    .
  9. ^
    S2CID 18993744
    . See Table 10.
  10. ^ Brandenburg, Axel; et al. (August 2017), "Evolution of Co-existing Long and Short Period Stellar Activity Cycles", The Astrophysical Journal, 845 (1): 79,
    doi:10.3847/1538-4357/aa7cfa
  11. ^
    doi:10.1086/303522
  12. ^
    S2CID 27151456
    .
  13. Centre de Données astronomiques de Strasbourg
    , retrieved 2012-02-04
  14. Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original
    on 2012-03-18, retrieved 2012-01-16
  15. doi:10.1086/186452
  16. doi:10.1086/175072
    See appendix A.
  17. S2CID 44208180

External links
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