F Centauri
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 12h 18m 59.76635s[2] |
| Declination | −55° 08′ 34.7346″[2] |
| Apparent magnitude (V) | +5.01[1] |
| Characteristics | |
| Spectral type | M1III[3] |
| B−V color index | 1.600±0.008[1] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | −7.1±2.8[1] km/s |
| Proper motion (μ) | RA: -79.258[2] mas/yr Dec.: -15.215[2] mas/yr |
| Parallax (π) | 7.3256±0.1919 mas[2] |
| Distance | 450 ± 10 ly (137 ± 4 pc) |
| Absolute magnitude (MV) | −0.87[1] |
| Details | |
| Radius | 47.9+3.9 −6.3[2] R☉ |
| Luminosity | 502±15[2] L☉ |
| Temperature | 3,948+287 −151[2] K |
| Other designations | |
| F Cen, NSV 5544, CPD−54°5113, FK5 2985, GC 16792, HD 107079, HIP 60059, HR 4682, SAO 239838, CCDM J12190-5509[5] | |
| Database references | |
| SIMBAD | data |
F Centauri is a suspected astrometric binary[6] star system in the southern constellation of Centaurus. It has a reddish hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around +5.01.[1] The system is located at a distance of approximately 450 light years from the Sun based on parallax, and it has an absolute magnitude of −0.87.[1] O. J. Eggen flagged this star as a member of the Hyades Supercluster.[7]
The visible component is an aging red giant star on the asymptotic giant branch[8] with a stellar classification of M1III,[3] indicating it has exhausted the supply of both hydrogen and helium at its core and is cooling and expanding. It is a suspected variable star of unknown type that has been measured ranging in brightness from visual magnitude 4.94 down to 5.07.[4] At present it has 48 times the radius of the Sun. It is radiating 502 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,948 K.[2]
References
[edit]- 1 2 3 4 5 6 7 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. XHIP record for this object at VizieR.
- 1 2 3 4 5 6 7 8 9 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.
- 1 2 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.
- 1 2 Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
- ↑ "F Cen". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-03-03.
- ↑ 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.
- ↑ Eggen, O. J. (February 1983), "NGC 2423 and the red giants of the Hyades supercluster", Astronomical Journal, 88: 190-196, Bibcode:1983AJ.....88..190E, doi:10.1086/113305.
- ↑ Eggen, Olin J. (July 1992), "Asymptotic giant branch stars near the sun", Astronomical Journal, 104 (1): 275–313, Bibcode:1992AJ....104..275E, doi:10.1086/116239.
