Gamma Comae Berenices

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γ Comae Berenices
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Coma Berenices
Right ascension 12h 26m 56.2723s[1]
Declination +28° 16′ 06.322″[1]
Apparent magnitude (V) 4.350[1]
Spectral type K1 III[1]
U−B color index +1.15[2]
B−V color index +1.13[2]
R−I color index +0.51[2]
Radial velocity (Rv) +3.38 ± 0.11[1] km/s
Proper motion (μ) RA: −83.41[1] mas/yr
Dec.: −80.99[1] mas/yr
Parallax (π) 19.18 ± 0.83[1] mas
Distance 170 ± 7 ly
(52 ± 2 pc)
Absolute magnitude (MV) 0.76[3]
Mass 1.66[3] M
Radius 10[4] R
Rotational velocity (v sin i) ≤ 17[2] km/s
Other designations
γ Com, Gamma Comae Berenices, Gamma Com, 15 Comae Berenices, 15 Com, BD+29 2288, FK5 2999, GC 16964, HD 108381, HIP 60742, HR 4737, PPM 101903, SAO 82313.[1]
Database references

Gamma Comae Berenices (Gamma Com, γ Comae Berenices, γ Com) is a K-type giant star in the constellation of Coma Berenices.[1] It has an apparent visual magnitude of approximately 4.350.[1] It appears as part of the cluster Melotte 111, although it is probably not actually in this cluster.[5]


  1. ^ a b c d e f g h i j k * gam Com -- Star in Cluster, database entry, SIMBAD. Accessed on line October 12, 2010.
  2. ^ a b c d HR 4737, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line October 12, 2010.
  3. ^ a b Hekker, S.; et al. (August 2006), "Precise radial velocities of giant stars. I. Stable stars", Astronomy and Astrophysics, 454 (3): 943–949, arXiv:astro-ph/0604502Freely accessible, Bibcode:2006A&A...454..943H, doi:10.1051/0004-6361:20064946 
  4. ^ HD 108381, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line October 12, 2010.
  5. ^ p. 124, Binocular astronomy, Stephen F. Tonkin, Springer, 2007, ISBN 1-84628-308-6.