Chi Centauri
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 06m 02.77s[1] |
| Declination | −41° 10′ 46.7″[1] |
| Apparent magnitude (V) | +4.353 ± 0.007[2] |
| Characteristics | |
| Spectral type | B2 V[3] |
| U−B color index | −0.774 ± 0.013[2] |
| B−V color index | −0.195 ± 0.006[2] |
| Variable type | β Cep[4] |
| Astrometry | |
| Radial velocity (Rv) | +12 km/s |
| Proper motion (μ) | RA: –22.90 ± 0.17[1] mas/yr Dec.: –21.69 ± 0.17[1] mas/yr |
| Parallax (π) | 6.39±0.21 mas[1] |
| Distance | 510 ± 20 ly (156 ± 5 pc) |
| Absolute magnitude (MV) | −1.50±0.14[5] |
| Details[5] | |
| Mass | 7.1±0.2 M☉ |
| Radius | 3.5±0.3 R☉ |
| Luminosity | 2,090+310 −270 L☉ |
| Surface gravity (log g) | 4.22±0.05 cgs |
| Temperature | 20,800±300 K |
| Rotational velocity (v sin i) | 18 ± 1[2] km/s |
| Age | 12+4 −5 Myr |
| Other designations | |
| 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.[7]
References
- ^ a b c d e 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
- ^ a b c d 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.
- ^ a b Nieva, María-Fernanda; Przybilla, Norbert (2014). "Fundamental properties of nearby single early B-type stars". Astronomy & Astrophysics. 566: A7. arXiv:1412.1418. Bibcode:2014A&A...566A...7N. doi:10.1051/0004-6361/201423373. S2CID 119227033.
- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 29 September 2024.
- ^ 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
