Astronomy:HD 156331
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Short description: Star in the constellation Ara
| 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 |
| 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 | |
| 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
- ↑ 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, Bibcode: 2007A&A...474..653V.
- ↑ 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, Bibcode: 1968MNSSA..27...11C
- ↑ 3.0 3.1 3.2 Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22
- ↑ 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. Bibcode: 2006AstL...32..759G.
- ↑ 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. Bibcode: 2011A&A...530A.138C.
- ↑ 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, Bibcode: 2012MNRAS.427..343M
External links
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