Astronomy:HD 156331

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Star in the constellation Ara
HD 156331
Observation data
Equinox J2000.0]] (ICRS)
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
Distance193 ± 6 ly
(59 ± 2 pc)
Details
HD 156331 A
Mass1.56[5] M
Luminosity8.6[6] L
Surface gravity (log g)3.46[5] cgs
Temperature6597[6] K
Metallicity [Fe/H]−0.02[5] dex
Age1.80[5] Gyr
Other designations
CD-49° 11324, HD 156331, HIP 84759, HR 6423, SAO 244631.
Database references
SIMBADdata

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

  1. 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode2007A&A...474..653V. 
  2. 2.0 2.1 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, Bibcode1968MNSSA..27...11C 
  3. 3.0 3.1 3.2 Mason, B. D. et al. (2014), The Washington Visual Double Star Catalog, doi:10.1086/323920, Bibcode2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, 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. doi:10.1134/S1063773706110065. Bibcode2006AstL...32..759G. 
  5. 5.0 5.1 5.2 5.3 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. doi:10.1051/0004-6361/201016276. Bibcode2011A&A...530A.138C. 
  6. 6.0 6.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode2012MNRAS.427..343M 

External links