63 Aurigae

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63 Aurigae
63 Aurigae.jpg
63 Aurigae in optical light
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension  07h 11m 39.32608s[1]
Declination +39° 19′ 13.9844″[1]
Apparent magnitude (V) 4.91[2]
Evolutionary stage giant
Spectral type K4 III[3]
B−V color index 1.451±0.005[2]
Radial velocity (Rv)−27.89±0.02[2] km/s
Proper motion (μ) RA: +45.655[1] mas/yr
Dec.: +2.791[1] mas/yr
Parallax (π)8.2489 ± 0.1974[1] mas
Distance395 ± 9 ly
(121 ± 3 pc)
Absolute magnitude (MV)−0.95[2]
[1] R
Luminosity335.37±9.25[1] L
Surface gravity (log g)1.88[4] cgs
[1] K
Metallicity [Fe/H]−0.17±0.06[2] dex
Other designations
63 Aur, BD+39°1882, FK5 274, HD 54716, HIP 34752, HR 2696, SAO 59866[5]
Database references

63 Aurigae is a single[6] star located around 395[1] light years away from the Sun in the northern constellation of Auriga.[5] It is visible to the naked eye as a faint, orange-hued star with an apparent magnitude of 4.91.[2] It is moving closer to the Earth with a heliocentric radial velocity of −28 km/s.[2]

This is an evolved giant star with a stellar classification of K4 III.[3] After exhausting the hydrogen at its core, the star has expanded to 37[1] times the radius of the Sun, it is radiating 335[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,068 K.[1]


  1. ^ a b c d e f g h i j k l Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d e f g Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  3. ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins Catalog of Revised MK Types for the Cooler Stars", The Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
  4. ^ McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
  5. ^ a b "63 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-24.
  6. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.