23 Comae Berenices

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23 Comae Berenices
Observation data
Epoch J2000      Equinox J2000
Constellation Coma Berenices
Right ascension 12h 34m 51.08058s[1]
Declination +22° 37′ 45.3303″[1]
Apparent magnitude (V) 4.773[2]
Characteristics
Evolutionary stage A0IV[3]
U−B color index −0.01[4]
B−V color index −0.03[4]
Astrometry
Radial velocity (Rv) −16.00 ± 1.8[5] km/s
Proper motion (μ) RA: −58.89[1] mas/yr
Dec.: 28.31[1] mas/yr
Parallax (π) 10.52 ± 0.52[1] mas
Distance 310 ± 20 ly
(95 ± 5 pc)
Orbit[6]
Period (P) 36.00 yr
Semi-major axis (a) 0.192″
Eccentricity (e) 0.910
Inclination (i) 119.1°
Longitude of the node (Ω) 199.9°
Periastron epoch (T) B 1960.81
Argument of periastron (ω)
(secondary)
14.7°
Other designations
BD+23° 2475, FK5 1323, HD 109485, HIP 61394, HR 4789, SAO 82390[3]
Database references
SIMBAD data

23 Comae Berenices (23 Com) is a binary star in the constellation Coma Berenices. Its apparent magnitude is 4.79.

References[edit]

  1. ^ a b c d e van Leeuwen, F.; et al. (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. ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. 
  3. ^ a b "* 23 Com". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 September 2012. 
  4. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M. 
  5. ^ Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878Freely accessible. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. 
  6. ^ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 20 August 2017.