| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14 06 02.77 |
| Declination | −41° 10′ 46.7″ |
| Apparent magnitude (V) | +4.353 ± 0.007 |
| Characteristics | |
| Spectral type | B2 V |
| U−B color index | −0.774 ± 0.013 |
| B−V color index | −0.195 ± 0.006 |
| Variable type | β Cep |
| Astrometry | |
| Radial velocity (Rv) | +12 km/s |
| Proper motion (μ) | RA: –22.90 ± 0.17 mas/yr Dec.: –21.69 ± 0.17 mas/yr |
| Parallax (π) | 6.39 ± 0.21 mas |
| Distance | 510 ± 20 ly (156 ± 5 pc) |
| Absolute magnitude (MV) | −1.3 |
| Details | |
| Mass | 8.2 ± 0.2 M☉ |
| Luminosity | 1,600 L☉ |
| Surface gravity (log g) | 4.22 ± 0.05 cgs |
| Temperature | 20,800 ± 300 K |
| Rotational velocity (v sin i) | 18 ± 1 km/s |
| Age | 9.1 ± 3.8 Myr |
| Other designations | |
| CD−40°8405, GC 19017, HD 122980, HIP 68862, HR 5285, SAO 224673 | |
| Database references | |
| SIMBAD | data |
Chi Centauri (χ Cen, χ Centauri) is a star in the constellation Centaurus.
χ Centauri is a blue-white B-type main sequence dwarf with a mean apparent magnitude of +4.36. It is approximately 510 light years from Earth. It is classified as a Beta Cephei type variable star and its brightness varies by 0.02 magnitudes with a period of 50.40 minutes.
This star is a proper motion member of the Upper Centaurus–Lupus sub-group in the Scorpius–Centaurus OB association, the nearest such co-moving association of massive stars to the Sun.
References
- ^ van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
- ^ Nieva, M.-F. (February 2013), "Temperature, gravity, and bolometric correction scales for non-supergiant OB stars", Astronomy & Astrophysics, 550: A26, arXiv:1212.0928, Bibcode:2013A&A...550A..26N, doi:10.1051/0004-6361/201219677, S2CID 119275940.
- ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873
- Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ^ de Geus, E. J.; de Zeeuw, P. T.; Lub, J. (June 1989), "Physical parameters of stars in the Scorpio-Centaurus OB association", Astronomy and Astrophysics, 216 (1–2): 44–61, Bibcode:1989A&A...216...44D
- "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 29 September 2024.
