| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus1 |
| Right ascension | 11h 37m 33.98833s2 |
| Declination | −47° 44′ 50.2343″2 |
| Apparent magnitude (V) | +5.461 |
| Characteristics | |
| Spectral type | K2 III3 |
| B−V color index | +1.23±0.011 |
| Astrometry | |
| Radial velocity (Rv) | −0.18±0.402 km/s |
| Proper motion (μ) | RA: −68.9562 mas/yr Dec.: +16.3622 mas/yr |
| Parallax (π) | 9.5467±0.1227 mas2 |
| Distance | 342 ± 4 ly (105 ± 1 pc) |
| Absolute magnitude (MV) | +0.301 |
| Details | |
| Mass | 2.164 M☉ |
| Radius | 15.85+0.30 −0.442 R☉ |
| Luminosity | 95.8±1.52 L☉ |
| Surface gravity (log g) | 2.125 cgs |
| Temperature | 4,535+174 −432 K |
| Metallicity [Fe/H] | 0.104 dex |
| Rotational velocity (v sin i) | >1.06 km/s |
| Other designations | |
| C3 Cen, CD−47°6997, HD 101067, HIP 56700, HR 4476, SAO 2229177 | |
| Database references | |
| SIMBAD | data |
C3 Centauri is a suspected astrometric binary8 star system in the southern constellation of Centaurus. It has an orange hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.46.1 The distance to this object is approximately 342 light years based on parallax.2 It is a member of the Hyades Stream of co-moving stars.9
The visible component of this system is an aging giant star with a stellar classification of K2 III,3 which indicates it has exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has 2.16 times the Sun's mass and with nearly sixteen2 times the girth of the Sun. It is radiating 962 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,535 K.2
References
References
- 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.
- 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.
- Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- Charbonnel, C.; et al. (2020), "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era", Astronomy and Astrophysics, 633: A34, arXiv:1910.12732, Bibcode:2020A&A...633A..34C, doi:10.1051/0004-6361/201936360, S2CID 204907220.
- Anders, F.; et al. (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.
- De Medeiros, J. R.; et al. (2014), "A catalog of rotational and radial velocities for evolved stars. V. Southern stars", Astronomy and Astrophysics, 561: A126, arXiv:1312.3474, Bibcode:2014A&A...561A.126D, doi:10.1051/0004-6361/201220762, S2CID 54046583.
- "HD 101067". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-03-02.
- 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 1985), "A systematic search for members of the Hyades supercluster. V. The red giants.", Astronomical Journal, 90: 333–340, Bibcode:1985AJ.....90..333E, doi:10.1086/113736.