HD 133683

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]

HD 133683

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Triangulum Australe
Right ascension	15^h 09^m 29.91331^s[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[1] mas
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
CD−66°1703, FK5 3195, HD 133683, HIP 74184, HR 5621, SAO 253031[7]
Database references
SIMBAD	data

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

1. 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.
2. 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.
3. Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
4. 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.
5. 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.
6. Ammler-von Eiff, M.; Reiners, A. (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.
7. "HD 133683". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-04.
8. 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.