| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14 49 32.38252 |
| Declination | +51° 22′ 28.2072″ |
| Apparent magnitude (V) | 6.51 |
| Characteristics | |
| Spectral type | F5IV |
| U−B color index | +0.00 |
| B−V color index | +0.40 |
| Astrometry | |
| Radial velocity (Rv) | -6.90 km/s |
| Proper motion (μ) | RA: +16.05 mas/yr Dec.: +1.71 mas/yr |
| Parallax (π) | 17.51 ± 0.69 mas |
| Distance | 186 ± 7 ly (57 ± 2 pc) |
| Details | |
| Mass | 1.53 M☉ |
| Luminosity | 6.8 L☉ |
| Surface gravity (log g) | 4.07 cgs |
| Temperature | 6,707 K |
| Metallicity | +0.04 dex |
| Age | 1.80 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. The magnitude 9.64 companion lies at an angular separation of 15.2″ along a position angle of 93°.
References
- ^ 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, S2CID 18759600.
- ^ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M.
- ^ 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 (5003): 1, Bibcode:2000IBVS.5003....1A
- 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.
- ^ 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.
- ^ 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.
- 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
External links
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