HD 156331

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HD 156331
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 19m 30.51713s[1]
Declination −50° 03′ 49.5490″[1]
Apparent magnitude (V) 6.27[2] (7.0 + 7.0)[3]
Characteristics
Spectral type F8III + B9V[3]
B−V color index +0.41[2]
Astrometry
Radial velocity (Rv) +10.50±1.2[4] km/s
Proper motion (μ) RA: +8.76[1] mas/yr
Dec.: −32.86[1] mas/yr
Parallax (π) 16.94 ± 0.51[1] mas
Distance 193 ± 6 ly
(59 ± 2 pc)
Details
HD 156331 A
Mass 1.56[5] M
Luminosity 8.6[6] L
Surface gravity (log g) 3.46[5] cgs
Temperature 6597[6] K
Metallicity [Fe/H] −0.02[5] dex
Age 1.80[5] Gyr
Other designations
CD-49° 11324, HD 156331, HIP 84759, HR 6423, SAO 244631.
Database references
SIMBAD data

HD 156331 is double star in the southern constellation of Ara. As of 2014, the pair have an angular separation of less than an arc second along a position angle of 49°.[3]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C 
  3. ^ a b c Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22 
  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:1103.4651Freely accessible. 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:1208.2037Freely accessible, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x 

External links[edit]