HD 131040

HD 131040 is a double star in the northern constellation of Boötes. The brighter component is a subgiant star that varies slightly in luminosity by 0.04 in magnitude.[3] The magnitude 9.64 companion lies at an angular separation of 15.2″ along a position angle of 93°.[7]

HD 131040
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 49m 32.38252s[1]
Declination +51° 22′ 28.2072″[1]
Apparent magnitude (V) 6.51[2]
Characteristics
Spectral type F5IV[3]
U−B color index +0.00[2]
B−V color index +0.40[2]
Astrometry
Radial velocity (Rv)-6.90[4] km/s
Proper motion (μ) RA: +16.05[1] mas/yr
Dec.: +1.71[1] mas/yr
Parallax (π)17.51 ± 0.69 mas[1]
Distance186 ± 7 ly
(57 ± 2 pc)
Details
Mass1.53[5] M☉
Luminosity6.8[6] L☉
Surface gravity (log g)4.07[5] cgs
Temperature6,707[6] K
Metallicity [Fe/H]+0.04[5] dex
Age1.80[5] Myr
Other designations
BD+51° 1957, HD 131040, HIP 72508, HR 5537, SAO 29296.
Database references
SIMBADdata

References
  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. Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M.
  3. Adelman, S. J.; Coursey, B. C.; Harris, E. A. (December 2000), "On the Variability of F1-F9 Luminosity Class III-V Stars", Information Bulletin on Variable Stars, 5003 (5003): 1, Bibcode:2000IBVS.5003....1A
  4. Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
  5. Casagrande, L.; et al. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics. 530 (A138): 21. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. S2CID 56118016.
  6. 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.
  7. Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22


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