31_Arietis

31 Arietis

31 Arietis

Binary star system in the constellation Aries

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 3.80 years and an eccentricity of 0.017. Both components of the system are F-type main sequence stars with a stellar classification of F7 V.[3] 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). The system is located near the ecliptic, so it is subject to occultation by the Moon.[7] The dynamical mass of the system is 3.36 ± 0.04 M☉.[3]

Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...

References

  1. [1]
    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, S2CID 18759600.
  2. [2]
    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.
  3. [3]
    Docobo, J. A.; Tamazian, V. S.; Malkov, O. Yu.; Campo, P. P.; Chulkov, D. A. (June 2016). "Improved orbits and parallaxes for eight visual binaries with unrealistic previous masses using the Hipparcos parallax". Monthly Notices of the Royal Astronomical Society. 459 (2): 1580–1585. arXiv:1609.03392. Bibcode:2016MNRAS.459.1580D. doi:10.1093/mnras/stw709.
  4. [4]
    "31 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-14.
  5. [5]
    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, S2CID 118577511.
  6. [6]
    Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1): 1, Bibcode:1970CoAsi.239....1B.
  7. [7]
    Richichi, A.; et al. (January 2016), "Lunar Occultations of 18 Stellar Sources from the 2.4 m Thai National Telescope", The Astronomical Journal, 151 (1): 5, Bibcode:2016AJ....151...10R, doi:10.3847/0004-6256/151/1/10, S2CID 119258140, 10.


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