Astronomy:F Centauri
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 18m 59.76635s[1] |
| Declination | −55° 08′ 34.7346″[1] |
| Apparent magnitude (V) | +5.01[2] |
| Characteristics | |
| Spectral type | M1III[3] |
| B−V color index | 1.600±0.008[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | −7.1±2.8[2] km/s |
| Proper motion (μ) | RA: -79.258[1] mas/yr Dec.: -15.215[1] mas/yr |
| Parallax (π) | 7.3256 ± 0.1919[1] mas |
| Distance | 450 ± 10 ly (137 ± 4 pc) |
| Absolute magnitude (MV) | −0.87[2] |
| Details | |
| Radius | 47.9+3.9 −6.3[1] R☉ |
| Luminosity | 502±15[1] L☉ |
| Temperature | 3,948+287 −151[1] K |
| Other designations | |
| 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.[2] 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.[2] 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.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 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.
- ↑ 4.0 4.1 Samus, N. N. et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S.
- ↑ "F Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=F+Cen.
- ↑ 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.
- ↑ Eggen, O. J. (February 1983), "NGC 2423 and the red giants of the Hyades supercluster", Astronomical Journal 88: 190-196, doi:10.1086/113305, Bibcode: 1983AJ.....88..190E.
- ↑ Eggen, Olin J. (July 1992), "Asymptotic giant branch stars near the sun", Astronomical Journal 104 (1): 275–313, doi:10.1086/116239, Bibcode: 1992AJ....104..275E.
 |  |
