HD 116243

This article is about m Centauri. Not to be confused with M Centauri.

HD 116243 is a single^[8] star in the southern constellation of Centaurus. It has the Bayer designation m Centauri, while HD 116243 is the identifier from the Henry Draper catalogue.^[7] This star has a yellow hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.52.^[2] It is located at a distance of approximately 244 light years from the Sun based on parallax,^[1] and it has an absolute magnitude of 0.01.^[2] It is drifting further away with a radial velocity of +13.3 km/s.^[1]

m Centauri

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Centaurus
Right ascension	13h 24m 00.48075s[1]
Declination	−64° 32′ 08.4097″[1]
Apparent magnitude (V)	+4.52[2]
Characteristics
Spectral type	G6IIb[3]
B−V color index	0.822±0.030[2]
Astrometry
Radial velocity (Rv)	+13.26±0.13[1] km/s
Proper motion (μ)	RA: 29.793[1] mas/yr Dec.: −21.465[1] mas/yr
Parallax (π)	13.3749 ± 0.1716 mas[1]
Distance	244 ± 3 ly (74.8 ± 1.0 pc)
Absolute magnitude (MV)	0.01[2]
Details
Mass	1.4[4] M☉
Radius	11.6+0.2 −2.6[1] R☉
Luminosity	88.8±1.3[1] L☉
Surface gravity (log g)	2.97[5] cgs
Temperature	5,197+704 −51[1] K
Metallicity [Fe/H]	−0.13[5] dex
Rotational velocity (v sin i)	4.3[6] km/s
Other designations
m Cen, CPD−63°2732, FK5 2985, GC 18107, HD 116243, HIP 65387, HR 5041, SAO 252293[7]
Database references
SIMBAD	data

This object is an aging bright giant star with a stellar classification of G6IIb^[3] With the supply of hydrogen at its core exhausted, it has expanded to 12 times the radius of the Sun. The star is radiating 89 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,197 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, S2CID 119257644.
3. Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
4. Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics, 628: A94, arXiv:1904.11302, Bibcode:2019A&A...628A..94A, doi:10.1051/0004-6361/201935765, S2CID 131780028.
5. Alves, S.; et al. (April 2015), "Determination of the spectroscopic stellar parameters for 257 field giant stars", Monthly Notices of the Royal Astronomical Society, 448 (3): 2749–2765, arXiv:1503.02556, Bibcode:2015MNRAS.448.2749A, doi:10.1093/mnras/stv189.
6. Pasquini, L.; et al. (2000), "Ca II activity and rotation in F-K evolved stars", Astronomy and Astrophysics, 361: 1011–1022, arXiv:astro-ph/0008109, Bibcode:2000A&A...361.1011P.
7. "m Cen". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-03-03.
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, S2CID 14878976.