HD 131040

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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[1] mas
Distance 186 ± 7 ly
(57 ± 2 pc)
Details
Mass 1.53[5] M
Luminosity 6.8[6] L
Surface gravity (log g) 4.07[5] cgs
Temperature 6,707[6] K
Metallicity [Fe/H] +0.04[5] dex
Age 1.80[5] Myr
Other designations
BD+51° 1957, HD 131040, HIP 72508, HR 5537, SAO 29296.
Database references
SIMBAD data

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]

References[edit]

  1. ^ 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. 
  2. ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data.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. ^ a b 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): 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, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065. 
  5. ^ a b c d 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. 
  6. ^ 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. 
  7. ^ Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22 

External links[edit]