HD 133683
(Redirected from 2 G. Trianguli Australis)
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Triangulum Australe |
| Right ascension | 15h 09m 29.91331s[1] |
| Declination | −67° 05′ 02.8878″[1] |
| Apparent magnitude (V) | +5.76[2] |
| Characteristics | |
| Spectral type | F5Ib[3] |
| B−V color index | 0.675±0.017[2] |
| Astrometry | |
| Radial velocity (Rv) | −14.72±0.14[1] km/s |
| Proper motion (μ) | RA: −3.146[1] mas/yr Dec.: −3.314[1] mas/yr |
| Parallax (π) | 0.9159 ± 0.0583 mas[1] |
| Distance | 3,600 ± 200 ly (1,090 ± 70 pc) |
| Details | |
| Mass | 11.59±1.12[4] M☉ |
| Radius | 79.3+1.9 −6.2[1] R☉ |
| Luminosity | 5,436±458[1] L☉ |
| Surface gravity (log g) | 1.70[5] cgs |
| Temperature | 5,567+231 −64[1] K |
| Metallicity [Fe/H] | 0.00[5] dex |
| Rotational velocity (v sin i) | 4.7±0.2[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 133683 is a single[8] star in the southern constellation of Triangulum Australe. It has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.76.[2] The distance to this star is approximately 3,600 light-years based on parallax, but it is drifting closer with a radial velocity of −14.7 km/s.[1]
This is a massive supergiant star with a stellar classification of F5Ib.[3] It has around 11[4] times the mass of the Sun and is spinning with a projected rotational velocity of 4.7 km/s.[6] The star has expanded to 79[1] times the radius of the Sun. It is radiating 5,400[1] times the luminosity of the Sun from its photosphere at an effective temperature of 5,567 K.[1]
References
[edit]- ^ a b c d e f g h i j k l m Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ a b Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355, S2CID 111387483.
- ^ a b Luck, R. Earle (2014), "Parameters and Abundances in Luminous Stars", The Astronomical Journal, 147 (6): 137, Bibcode:2014AJ....147..137L, doi:10.1088/0004-6256/147/6/137.
- ^ a b Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
- ^ "HD 133683". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-04.
- ^ 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.
