Astronomy:12 Trianguli
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Short description: Star in the constellation Triangulum
  | |
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Triangulum |
| Right ascension | 02h 28m 09.980s[1] |
| Declination | +29° 40′ 09.59″[1] |
| Apparent magnitude (V) | 5.37[2] |
| Characteristics | |
| Spectral type | F0 III[3][4][5][6] |
| B−V color index | +0.29[6] |
| Astrometry | |
| Radial velocity (Rv) | −24.8±2.8[7][6] km/s |
| Proper motion (μ) | RA: −15.632[1] mas/yr Dec.: −86.097[1] mas/yr |
| Parallax (π) | 20.4105 ± 0.0942[1] mas |
| Distance | 159.8 ± 0.7 ly (49.0 ± 0.2 pc) |
| Details | |
| Mass | 1.6[2] M☉ |
| Luminosity | 14[2] L☉ |
| Surface gravity (log g) | 3.79[6] cgs |
| Temperature | 7,199[2] K |
| Metallicity [Fe/H] | 0.27[5] dex |
| Rotational velocity (v sin i) | 85[8][9] km/s |
| Age | 2.19[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
12 Trianguli is a solitary[10] star located in the northern constellation Triangulum, with an apparent magnitude of 5.37,[2] making it faintly visible to the naked eye under ideal conditions. The star is situated 160 light years[1] away but is approaching with a heliocentric radial velocity of −24.8 km/s.[7][6] It is calculated to be about 2.19 Gyr old[6] with a stellar classification of F0 III,[3][4][5][6] making it an F-type giant. It has 1.6 times the mass of the Sun[2] and shines at 14 times the luminosity of the Sun[2] from its photosphere at an effective temperature of 7,199 K.[2]
Together with ι Trianguli and 10 Trianguli, it forms part of the obsolete Triangulum Minus.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Reiners, Ansgar; Zechmeister, Mathias (2020). "Radial velocity photon limits for the dwarf stars of spectral classes F--M". The Astrophysical Journal Supplement Series 247 (1): 11. doi:10.3847/1538-4365/ab609f. Bibcode: 2020ApJS..247...11R.
- ↑ 3.0 3.1 Kervella, Pierre; Arenou, Frédéric; Mignard, François; Thévenin, Frédéric (March 2019). "Stellar and substellar companions of nearby stars from Gaia DR2 - Binarity from proper motion anomaly". Astronomy and Astrophysics 623: 623. doi:10.1051/0004-6361/201834371. Bibcode: 2019A&A...623A..72K.
- ↑ 4.0 4.1 Cruzalèbes, P. et al. (2019). "A catalogue of stellar diameters and fluxes for mid-infrared interferometry". Monthly Notices of the Royal Astronomical Society 490 (3): 3158–3176. doi:10.1093/mnras/stz2803. Bibcode: 2019MNRAS.490.3158C.
- ↑ 5.0 5.1 5.2 Netopil, Martin (2017). "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system". Monthly Notices of the Royal Astronomical Society 469 (3): 3042–3055. doi:10.1093/mnras/stx1077. Bibcode: 2017MNRAS.469.3042N.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 Luck, R. Earle (2015). "Abundances in the Local Region I: G and K Giants". The Astronomical Journal 150 (3): 88. doi:10.1088/0004-6256/150/3/88. Bibcode: 2015AJ....150...88L.
- ↑ 7.0 7.1 Brandt, Timothy D. (2021). "The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 Edition". The Astrophysical Journal Supplement Series 254 (2): 42. doi:10.3847/1538-4365/abf93c. Bibcode: 2021ApJS..254...42B.
- ↑ van Belle, G.T. (2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review 20 (1): 51. doi:10.1007/s00159-012-0051-2. Bibcode: 2012A&ARv..20...51V.
- ↑ de Bruijne, J.H.J.; Eilers, A.-C. (2012). "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project". Astronomy & Astrophysics 546: 14. doi:10.1051/0004-6361/201219219. Bibcode: 2012A&A...546A..61D.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E
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