Astronomy:Chi Centauri
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Short description: Star in the constellation Centaurus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| Distance | 510 ± 20 ly (156 ± 5 pc) |
| Absolute magnitude (MV) | −1.3[5] |
| Details | |
| Mass | 8.2 ± 0.2[3] M☉ |
| Luminosity | 1,600[5] L☉ |
| Surface gravity (log g) | 4.22 ± 0.05[2] cgs |
| Temperature | 20,800 ± 300[2] K |
| Rotational velocity (v sin i) | 18 ± 1[2] km/s |
| Age | 9.1 ± 3.8[3] 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.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL. Vizier catalog entry
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Nieva, M.-F. (February 2013), "Temperature, gravity, and bolometric correction scales for non-supergiant OB stars", Astronomy & Astrophysics 550: A26, doi:10.1051/0004-6361/201219677, Bibcode: 2013A&A...550A..26N.
- ↑ 3.0 3.1 3.2 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, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T
- ↑ Samus, N. N. 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.
- ↑ 5.0 5.1 5.2 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
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