13 Comae Berenices

13 Comae Berenices
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Coma Berenices
Right ascension 12h 24m 18.52125s[1]
Declination +26° 05′ 55.0346″[1]
Apparent magnitude (V) 5.17[2]
Characteristics
Spectral type A3 V[3][2]
B−V color index 0.082±0.003[2]
Astrometry
Radial velocity (Rv)+0.1±0.1[4] km/s
Proper motion (μ) RA: −28.29[1] mas/yr
Dec.: +3.07[1] mas/yr
Parallax (π)12.33 ± 1.11 mas[1]
Distance260 ± 20 ly
(81 ± 7 pc)
Absolute magnitude (MV)0.38[2]
Details
Mass2.83[5] M☉
Luminosity60.93[2] L☉
Surface gravity (log g)3.84±0.14[5] cgs
Temperature8,846±301[5] K
Metallicity [Fe/H]0.24[2] dex
Rotational velocity (v sin i)48[5] km/s
Age429[5] Myr
Other designations
13 Com, GN Com, BD+26° 2344, HD 107966, HIP 60514, HR 4717, SAO 82291[6]
Database references
SIMBADdata

13 Comae Berenices is a probable binary star[3] system in the northern constellation of Coma Berenices. It has an apparent visual magnitude of 5.17,[2] which is bright enough to be faintly visible to the naked eye. With an annual parallax shift of 12.33 mas,[1] it is located around 260 light years from the Sun. It is member of the nearby Coma Star Cluster (Melotte 111).[7]

Based on measured changes in the star's motion, this is most likely an astrometric binary system.[3] The visible component is an A-type main-sequence star with a stellar classification of A3 V.[3] It is catalogued as an Alpha2 Canum Venaticorum variable[8] with the designation GN Com.[9] Rensom (1990) listed it as a suspected Am star.[10] The system is a source of X-ray emission, which may be coming from the companion.[11]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ "13 Com". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-17.
  7. ^ Cite error: The named reference Casewell2006 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Hoffleit1982 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Kukarkin1975 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Renson1990 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Schroeder2007 was invoked but never defined (see the help page).