Astronomy:11 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 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[1] mas |
| 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
- ↑ 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 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. doi:10.1888/0333750888/2862. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 3.2 3.3 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, doi:10.1051/0004-6361/201833111, A33, Bibcode: 2018A&A...616A..33S.
- ↑ 4.0 4.1 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. doi:10.3847/1538-4357/ab27c0. Bibcode: 2019ApJ...880...49H.
- ↑ 5.0 5.1 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.
- ↑ 6.0 6.1 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.
- ↑ 7.0 7.1 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. doi:10.1051/0004-6361:20078788. Bibcode: 2008A&A...480...91S.
- ↑ 8.0 8.1 8.2 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. doi:10.1051/0004-6361/201834371. Bibcode: 2019A&A...623A..72K.
- ↑ 9.0 9.1 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. doi:10.1051/0004-6361/201322360. Bibcode: 2015A&A...574A.116R.
- ↑ 10.0 10.1 10.2 Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics 591: A118. doi:10.1051/0004-6361/201628497. Bibcode: 2016A&A...591A.118S.
- ↑ 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. doi:10.1051/0004-6361:20078788. Bibcode: 2008AJ....135..209M.
- ↑ 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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