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31 Arietis

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This is an old revision of this page, as edited by Cuddlyopedia (talk | contribs) at 10:02, 14 December 2015 (Modifed to avoid impression article is about the Flamsteed designation; adding abbreviation). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

31 Arietis
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 02h 36m 37.91730s[1]
Declination +12° 26′ 51.4867″[1]
Apparent magnitude (V) 5.75[2]
Characteristics
Spectral type F7 V[2]
U−B color index –0.05[3]
B−V color index +0.47[3]
Astrometry
Radial velocity (Rv)+8.8 km/s
Proper motion (μ) RA: +282.19[1] mas/yr
Dec.: –86.84[1] mas/yr
Parallax (π)28.79 ± 0.43 mas[1]
Distance113 ± 2 ly
(34.7 ± 0.5 pc)
Absolute magnitude (MV)2.94[4]
Details
Temperature6,137[4] K
Metallicity [Fe/H]–0.25[4] dex
Rotational velocity (v sin i)5[5] km/s
Age2.8[4] Gyr
Other designations
BD+11 360, FK5 2179, HD 16234, HIP 12153, HR 763, SAO 93022, WDS J02366+1227.[3]

31 Arietis (abbreviated 31 Ari) is a binary star in the northern constellation of Aries. 31 Arietis is the Flamsteed designation. The two members of this system orbit each other with a period of 1.924 years and an eccentricity of 0.88. The primary component is an F-type main sequence star with a stellar classification of F7 V. The pair have an apparent visual magnitude of 5.75,[2] which is just bright enough to be faintly visible to the naked eye. Based upon an annual parallax shift of 28.79 mas,[1] the distance to this system is approximately 113 light-years (35 parsecs).

References

  1. ^ a b c d e f van Leeuwen, F. (November 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.
  2. ^ a b c 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.{{citation}}: CS1 maint: unflagged free DOI (link)
  3. ^ a b c "31 Ari -- Double or multiple star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-14.
  4. ^ a b c d Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
  5. ^ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1), Bibcode:1970CoAsi.239....1B.