Omicron Aurigae

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Omicron Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 45m 54.04306s[1]
Declination +49° 49′ 34.6097″[1]
Apparent magnitude (V) +5.47[2]
Distance 413 ± 44 ly
(127 ± 13[1] pc)
Spectral type A1 Cr Eu[3]
Other designations
27 Aurigae, BD+49°1398, FK5 216, HD 38104, HIP 27196, HR 1971, SAO 40583.[4]

Omicron Aurigae (ο Aurigae) is the Bayer designation for an astrometric binary[5] star system in the northern constellation of Auriga. With an apparent visual magnitude of 5.47,[2] it is faintly visible to the naked eye. Based upon an annual parallax shift of 7.89 ± 0.84 mas,[1] it is approximately 413 light-years (127 parsecs) distant from Earth. The visible component is a chemically peculiar star with a stellar classification of A1 Cr Eu; meaning this is an A-type star with a spectrum that shows abnormal abundances of chromium (Cr) and europium (Eu).[3]


  1. ^ a b c d van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752v1free to read, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.  Note: see VizieR catalogue I/311.
  2. ^ a b Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J. 
  3. ^ a b Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788. 
  4. ^ "omi Aur -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-19. 
  5. ^ Makarov, V. V.; Kaplan, G. H. (May 2005), "Statistical Constraints for Astrometric Binaries with Nonlinear Motion", The Astronomical Journal, 129 (5): 2420–2427, Bibcode:2005AJ....129.2420M, doi:10.1086/429590. 

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