37 Comae Berenices

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37 Comae Berenices
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Coma Berenices
Right ascension 13h 00m 16.47021s[1]
Declination +30° 47′ 06.0712″[1]
Apparent magnitude (V) 4.88[2]
Spectral type G8II-III[2]
Variable type RS CVn[3]
Radial velocity (Rv) −14.34[4] km/s
Proper motion (μ) RA: −22.49[1] mas/yr
Dec.: −6.98[1] mas/yr
Parallax (π) 4.94 ± 0.55[1] mas
Distance approx. 660 ly
(approx. 200 pc)
Mass 5.25 M
Radius 38.2 R
Luminosity (bolometric) 590 L
Surface gravity (log g) 2.3 cgs
Temperature 4,600 K
Rotational velocity (v sin i) 11 km/s
Other designations
37 Com, LU Com, HR 4929, HIP 63462, HD 112989, BD +31°2434
Database references

37 Comae Berenices (37 Com) is a star in the constellation Coma Berenices. Its apparent magnitude is 4.88. It is a weak G-band star, a luminous giant star with a carbon abundance about a factor of 5 lower than is typical for such stars.[5] It is also a variable star of the RS CVn type, classified as LU Com.

37 Comae Berenices was a latter designation of 13 Canum Venaticorum.[6]


  1. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b c Aurière, M.; Konstantinova-Antova, R.; Charbonnel, C.; Wade, G. A.; Tsvetkova, S.; Petit, P.; Dintrans, B.; Drake, N. A.; Decressin, T.; Lagarde, N.; Donati, J.-F.; Roudier, T.; Lignières, F.; Schröder, K.-P.; Landstreet, J. D.; Lèbre, A.; Weiss, W. W.; Zahn, J.-P. (2015). "The magnetic fields at the surface of active single G-K giants". Astronomy & Astrophysics. 574: A90. arXiv:1411.6230Freely accessible. Bibcode:2015A&A...574A..90A. doi:10.1051/0004-6361/201424579. 
  3. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S. 
  4. ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165–186. arXiv:astro-ph/0409579Freely accessible. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. 
  5. ^ Lambert, D.L.; Ries, L.M. (Aug 15, 1981). "Carbon, nitrogen, and oxygen abundances in G and K giants". Astrophysical Journal. 248: 228–248. Bibcode:1981ApJ...248..228L. doi:10.1086/159147. 
  6. ^ Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy, Vol.18, NO. 3/AUG, P.209, 1987. 18: 214. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305.