Psi8 Aurigae

Psi8 Aurigae
Location of ψ8 Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 53m 57.073s[1]
Declination +38° 30′ 18.07″[1]
Apparent magnitude (V) 6.443±0.010[2]
Characteristics
Spectral type B9.5p[3]
Apparent magnitude (J) 6.471±0.034[4]
Apparent magnitude (H) 6.532±0.036[4]
Apparent magnitude (K) 6.514±0.018[4]
Astrometry
Proper motion (μ) RA: −1.307[1] mas/yr
Dec.: −27.406[1] mas/yr
Parallax (π)4.8897±0.0602 mas[1]
Distance667 ± 8 ly
(205 ± 3 pc)
Details
Mass2.0[5] M☉
Radius3.1[5] R☉
Luminosity100[5] L☉
Surface gravity (log g)3.68[5] cgs
Temperature10,200[5] K
Metallicity [Fe/H]−0.161[6] dex
Rotational velocity (v sin i)40[7] km/s
Age234[5] Myr
Other designations
61 Aurigae, BD+38°1638, HD 50204, HIP 33133, HR 2547, SAO 59589.[2]
Database references
SIMBADdata

Psi8 Aurigae (ψ8 Aur, ψ8 Aurigae) is a star in the northern constellation of Auriga. It has an apparent visual magnitude of 6.443 and, based upon parallax measurements, it is approximately 667 light-years (205 parsecs) distant from the Earth.

The spectrum of the star matches a stellar classification of B9.5p, matching a very late B-type star with unspecified luminosity class. The "p" indicates a peculiarity in the spectrum.[3] φ8 Aurigae has been reported to be an Ap star with unusually string silicon lines in its spectrum, or a mercury-manganese star,[8] but it is now considered doubtful whether it is actually a chemically peculiar star.[9]

References

  1. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 "* psi08 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-24.
  3. 1 2 Cowley, A.; et al. (1969). "A study of the bright stars. I. A catalogue of spectral classifications". The Astronomical Journal. 74: 375–406. Bibcode:1969AJ.....74..375C. doi:10.1086/110819.
  4. 1 2 3 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331. Vizier catalog entry
  5. 1 2 3 4 5 6 Glagolevskij, Yu. V. (2019). "On Properties of Main Sequence Magnetic Stars". Astrophysical Bulletin. 74 (1): 66. Bibcode:2019AstBu..74...66G. doi:10.1134/S1990341319010073.
  6. ↑ Cardiel, Nicolás; Zamorano, Jaime; Carrasco, Josep Manel; Masana, Eduard; Bará, Salvador; González, Rafael; Izquierdo, Jaime; Pascual, Sergio; Sánchez De Miguel, Alejandro (2021). "RGB photometric calibration of 15 million Gaia stars". Monthly Notices of the Royal Astronomical Society. 507 (1): 318. arXiv:2107.08734. Bibcode:2021MNRAS.507..318C. doi:10.1093/mnras/stab2124.
  7. ↑ Abt, Helmut A.; et al. (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
  8. ↑ Osawa, Kiyoteru (1965). "Spectral classification and three-color photometry of A-type peculiar stars". Annals of the Tokyo Astronomical Observatory. 9 (3): 121. Bibcode:1965AnTok...9..121O.
  9. ↑ Renson, P.; Manfroid, J. (2009). "Catalogue of Ap, HGMN and Am stars". Astronomy and Astrophysics. 498 (3): 961. Bibcode:2009A&A...498..961R. doi:10.1051/0004-6361/200810788.
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