11 Trianguli
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Triangulum |
| Right ascension | 02h 27m 27.771s[1] |
| Declination | +31° 48′ 04.61″[1] |
| Apparent magnitude (V) | 5.55[2] |
| Characteristics | |
| Evolutionary stage | horizontal branch[3] |
| Spectral type | K1 III[4][5] |
| B−V color index | +1.1[2] |
| Astrometry | |
| Radial velocity (Rv) | −41.614±0.163[6] km/s |
| Proper motion (μ) | RA: −24.331[1] mas/yr Dec.: −27.845[1] mas/yr |
| Parallax (π) | 11.6240 ± 0.1293 mas[1] |
| Distance | 281 ± 3 ly (86.0 ± 1.0 pc) |
| Absolute magnitude (MV) | 0.836[7] |
| Details | |
| Mass | 2.446±0.122[8] M☉ |
| Radius | 12.055±0.603[8] R☉ |
| Luminosity | 54.6±3.8[9] L☉ |
| Surface gravity (log g) | 2.2[10] cgs |
| Temperature | 4,572[10] K |
| Metallicity [Fe/H] | −0.19[7][11] dex |
| Age | 6.3+2.8 −1.4[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
11 Trianguli is a solitary[12] star located in the northern constellation Triangulum, with an apparent magnitude of 5.55. The star is situated 281 light years[1] away but is approaching with a heliocentric radial velocity of −41.614 km/s.[6] It is probably on the horizontal branch fusing helium in its core,[3] and is calculated to be about 6.3 Gyr old.[3] It has a stellar classification of K1 III.[4][5] It has 2.446 times the mass of the Sun and 12.055 times the radius of the Sun.[8] It shines at 54.6 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 4,572 K.[10]
References[edit]
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
- ^ a b c d Stock, Stephan; et al. (August 2018), "Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search", Astronomy & Astrophysics, 616: 15, arXiv:1805.04094, Bibcode:2018A&A...616A..33S, doi:10.1051/0004-6361/201833111, S2CID 119361866, A33.
- ^ a b Hinkel, Natalie R.; Unterborn, Cayman; Kane, Stephen R.; Somers, Garrett; Galvez, Richard (2019). "A Recommendation Algorithm to Predict Giant Exoplanet Host Stars Using Stellar Elemental Abundances". The Astrophysical Journal. 880 (1): 49. arXiv:1805.12144. Bibcode:2019ApJ...880...49H. doi:10.3847/1538-4357/ab27c0.
- ^ a b 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. arXiv:1910.00542. Bibcode:2019MNRAS.490.3158C. doi:10.1093/mnras/stz2803.
- ^ a b Brandt, Timothy D. (2021). "The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 Edition". The Astrophysical Journal Supplement Series. 254 (2): 42. arXiv:2105.11662. Bibcode:2021ApJS..254...42B. doi:10.3847/1538-4365/abf93c.
- ^ a b Soubiran, C.; Bienayme, O.; Mishenina, T.V. (2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy & Astrophysics. 480 (1): 91–101. arXiv:0712.1370. Bibcode:2008A&A...480...91S. doi:10.1051/0004-6361:20078788.
- ^ a b c 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. arXiv:1811.08902. Bibcode:2019A&A...623A..72K. doi:10.1051/0004-6361/201834371.
- ^ a b Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity". Astronomy and Astrophysics. 574. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360.
- ^ a b c Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497.
- ^ Massarotti, Alessandro; Latham, D.W.; Stefanik, R.P.; Fogel, Jeffrey (2008). "Rotational and radial velocities for a sample of 761 Hipparcos giants and the role of binarity". The Astronomical Journal. 135 (1): 209. arXiv:0712.1370. Bibcode:2008AJ....135..209M. doi:10.1051/0004-6361:20078788.
- ^ 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. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
