HD 156331
Star in the constellation Ara
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]
| 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 mas[1] |
| 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 |
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, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ 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, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, 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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ 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. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. S2CID 56118016.
- ^ 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, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352
External links
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