54 Aurigae

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54 Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 39m 33.11965s[1]
Declination +28° 15′ 47.2740″[1]
Apparent magnitude (V) 6.02[2] (6.22 + 7.82)[3]
Characteristics
Spectral type B7 III[4]
B−V color index −0.087±0.007[2]
Variable type suspected[5]
Astrometry
Radial velocity (Rv)+19.0±4.3[2] km/s
Proper motion (μ) RA: −6.24[1] mas/yr
Dec.: −10.81[1] mas/yr
Parallax (π)3.87 ± 0.89[1] mas
Distanceapprox. 800 ly
(approx. 260 pc)
Details
54 Aur A
Luminosity315.49[6] L☉
Temperature11,083[6] K
Rotational velocity (v sin i)65[7] km/s
Other designations
54 Aur, NSV 3065, BD+28°1196, FK5 2504, GC 8681, HD 47395, HIP 31852, HR 2438, SAO 78593, ADS 5289, WDS J06395+2816[8]
Database references
SIMBADdata

54 Aurigae is a binary star[3] system located around 800 light-years (51,000,000 AU) away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a dim, blue-white hued star with a combined apparent visual magnitude of 6.02.[2] The system is moving further from the Sun with a heliocentric radial velocity of around +19 km/s.[2]

The primary component is a B-type giant star of visual magnitude 6.22[3] with a stellar classification of B7 III.[4] This is a suspected variable star of unknown type with a measured amplitude of 0.02 in visual magnitude.[5] It is radiating 315 times the luminosity of the Sun from its photosphere at an effective temperature of 11,083 K (10,810 °C; 19,490 °F),[6] and is spinning with a projected rotational velocity of 65 kilometres per second (40 mi/s).[7] The secondary companion is a magnitude 7.82 star at an angular separation of 0.80″ along a position angle of 34° from the primary, as of 2008.[3]

References[]

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. ^ a b c d e 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, S2CID 119257644.
  3. ^ a b c d 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, S2CID 14878976.
  4. ^ a b Cucchiaro, A.; et al. (October 1977), "Spectral classification from the ultraviolet line features of S2/68 spectra. II - Late B-type stars", Astronomy and Astrophysics Supplement Series, 30: 71–79, Bibcode:1977A&AS...30...71C.
  5. ^ a b Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
  6. ^ a b c McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
  7. ^ a b Abt, Helmut A.; et al. (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590
  8. ^ "54 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-24.
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