53 Aurigae

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53 Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension  06h 38m 23.01009s[1]
Declination +28° 59′ 03.6220″[1]
Apparent magnitude (V) 5.744[2]
Spectral type B9 Mn + F0m[3]
U−B color index −0.07[4]
B−V color index −0.02[4]
Radial velocity (Rv)13.1±5.0[5] km/s
Proper motion (μ) RA: −16.390[1] mas/yr
Dec.: −14.305[1] mas/yr
Parallax (π)8.5139 ± 0.1372[1] mas
Distance383 ± 6 ly
(117 ± 2 pc)
Absolute magnitude (MV)+0.48[6]
Period (P)38.90 yr
Semi-major axis (a)0.159″
Eccentricity (e)0.557
Inclination (i)119.5°
Longitude of the node (Ω)113.5°
Periastron epoch (T)B 1976.73
Argument of periastron (ω)
53 Aur A
Mass2.49±0.13[8] M
Surface gravity (log g)4.0[3] cgs
Temperature10750[3] K
Rotational velocity (v sin i)25[3] km/s
53 Aur B
Surface gravity (log g)4.0[3] cgs
Temperature7,250[3] K
Rotational velocity (v sin i)0[3] km/s
Other designations
BD+29°1293, GC 8649, HD 47152, HIP 31737, HR 2425, SAO 78571, PPM 96293, CCDM J06384+2859, WDS J06384+2859, TYC 1892-236-1, GSC 01892-00236
Database references

53 Aurigae is a binary star system in the northern constellation of Auriga. It is visible to the naked eye as a dim star with a combined apparent visual magnitude of 5.74.[2] Parallax estimates put it at a distance of 383 light-years (117 parsecs) away;[1] the system is receding from the Earth with a heliocentric radial velocity of 13 km/s.[5]

The two components of 53 Aurigae orbit each other every 39 years with an eccentricity of 0.557.[7] The primary component, 53 Aurigae A, is chemically peculiar since it contains higher-than-normal amounts of manganese,[3] but also europium, chromium, and mercury,[8] it is a B-type main-sequence star,[8] while the secondary component, 53 Aurigae B, is an early F-type main-sequence star.[8] The total mass of the system is estimated to be 4.8 M.[8]


  1. ^ a b c d e f 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 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 c d e f g h Zverko, J.; Žižňovský, J.; Mikulášek, Z.; Iliev, I. Kh. (2008). "53 Aurigae revisited: a B9Mn + F0m composite spectrum". Contributions of the Astronomical Observatory Skalnaté Pleso. 38 (2): 467–468. Bibcode:2008CoSka..38..467Z.
  4. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
  5. ^ a b 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.
  6. ^ Murphy, Simon J.; Corbally, Christopher J.; Gray, Richard O.; Cheng, Kwang-Ping; Neff, James E.; Koen, Chris; Kuehn, Charles A.; Newsome, Ian; Riggs, Quinlin (2015). "An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue". Publications of the Astronomical Society of Australia. 32: e036. arXiv:1508.03633. Bibcode:2015PASA...32...36M. doi:10.1017/pasa.2015.34.
  7. ^ a b "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 28 May 2017.
  8. ^ a b c d e Wraight, K. T.; Fossati, L.; Netopil, M.; Paunzen, E.; Rode-Paunzen, M.; Bewsher, D.; Norton, A. J.; White, Glenn J. (2012). "A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars★". Monthly Notices of the Royal Astronomical Society. 420: 757. arXiv:1110.6283. Bibcode:2012MNRAS.420..757W. doi:10.1111/j.1365-2966.2011.20090.x.