en HD 131473

HD 131473
Observation data; Epoch J2000 Equinox J2000
Constellation	Boötes
Right ascension	14h 53m 23.34844s
Declination	+15° 42′ 18.602″
Apparent magnitude (V)	6.403; (6.89 / 7.55)
Characteristics
Spectral type	F4IV / G1IV
U−B color index	+0.122
B−V color index	+0.570
Astrometry
Radial velocity (Rv)	20.8 km/s
Proper motion (μ)	RA: −22.72 mas/yr ; Dec.: +21.58 mas/yr
Parallax (π)	20.99 ± 0.93 mas
Distance	155 ± 7 ly ; (48 ± 2 pc)
Absolute magnitude (MV)	2.98
Orbit
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
Mass	1.34 M☉
Luminosity	5.1 L☉
Temperature	5,870 K
Metallicity [Fe/H]	0.19 dex
Age	2.5 Gyr
HD 131473 B
Mass	1.19 M☉
Other designations
	BD+16° 2705, HD 131473, HIP 72846, HR 5550, SAO 101273.
Database references
SIMBAD	data

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

^ ^a ^b ^c ^d ^e 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.
^ ^a ^b ^c 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.
^ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 1 August 2017. Retrieved 14 July 2017.
^ ^a ^b Edwards, T. W. (1976). "MK classification for visual binary components". The Astronomical Journal. 81: 245. Bibcode:1976AJ.....81..245E. doi:10.1086/111879.
^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W.
^ ^a ^b ^c 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.
^ 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.
^ ^a ^b 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, S2CID 56066740, 87.
^ ^a ^b 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, S2CID 118665352.

External links

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[vanLeeuwen2007-1] 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.

[aaass47_221-2] 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.

[ORB6-3] "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 1 August 2017. Retrieved 14 July 2017.

[Edwards-4] Edwards, T. W. (1976). "MK classification for visual binary components". The Astronomical Journal. 81: 245. Bibcode:1976AJ.....81..245E. doi:10.1086/111879.

[gcsrv-5] Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W.

[cgssn09-6] 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.

[Heintz1998-7] 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.

[aj147_4_87-8] 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, S2CID 56066740, 87.

[Mcdonald_et_al_2012-9] 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, S2CID 118665352.

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HD 131473

References

External links

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