HD 131473

HD 131473
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 53m 23.34844s[1]
Declination +15° 42′ 18.602″[1]
Apparent magnitude (V) 6.403[2]
(6.89 / 7.55)[3]
Characteristics
Spectral type F4IV / G1IV[4]
U−B color index +0.122[2]
B−V color index +0.570[2]
Astrometry
Radial velocity (Rv)20.8[5] km/s
Proper motion (μ) RA: −22.72[1] mas/yr
Dec.: +21.58[1] mas/yr
Parallax (π)20.99 ± 0.93[1] mas
Distance155 ± 7 ly
(48 ± 2 pc)
Absolute magnitude (MV)2.98[6]
Orbit[7]
Period (P)313 yr
Semi-major axis (a)1.358″
Eccentricity (e)0.50
Inclination (i)108.5°
Longitude of the node (Ω)12.5°
Periastron epoch (T)1824.0
Argument of periastron (ω)
(secondary)		49°
Details
HD 131473 A
Mass1.34[8] M☉
Luminosity5.1[9] L☉
Temperature5,870[9] K
Metallicity [Fe/H]0.19[6] dex
Age2.5[6] Gyr
HD 131473 B
Mass1.19[8] M☉
Other designations
BD+16° 2705, HD 131473, HIP 72846, HR 5550, SAO 101273.
Database references
SIMBADdata

HD 131473 is a binary star system in the northern constellation of Boötes. The primary is an F-type subgiant with a stellar classification of F4IV, while its companion is a G-type subgiant with a stellar classification of G1IV.[4]

References

  1. 1 2 3 4 5 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. 1 2 3 Rakos, K. D.; et al. (February 1982), "Photometric and astrometric observations of close visual binaries", Astronomy and Astrophysics Supplement Series, 47: 221–235, Bibcode:1982A&AS...47..221R.
  3. ↑ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 14 July 2017.
  4. 1 2 Edwards, T. W. (1976). "MK classification for visual binary components". Bibcode:1976AJ.....81..245E. doi:10.1086/111879.
  5. ↑ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W.
  6. 1 2 3 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.
  7. ↑ Heintz, W. D. (July 1998), "Observations of Double Stars. XVIII.", The Astrophysical Journal Supplement Series, 117 (2): 587–598, Bibcode:1998ApJS..117..587H, doi:10.1086/313127.
  8. 1 2 Tokovinin, Andrei (April 2014), "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs", The Astronomical Journal, 147 (4): 14, arXiv:1401.6827, Bibcode:2014AJ....147...87T, doi:10.1088/0004-6256/147/4/87, 87.
  9. 1 2 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.


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