  | |
| 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−Bcolor index | −0.774 ± 0.013[2] |
| B−Vcolor 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 | |
| CD−40°8405,GC 19017,HD 122980,HIP 68862,HR 5285,SAO 224673 | |
| Database references | |
| SIMBAD | data |
Chi Centauri (χ Cen, χ Centauri) is astar in theconstellationCentaurus.
χ Centauri is a blue-whiteB-typemain sequence dwarf with a meanapparent magnitude of +4.36. It is approximately 510light years fromEarth. It is classified as aBeta Cephei typevariable star and its brightness varies by 0.02 magnitudes with a period of 50.40 minutes.
This star is aproper motion member of the Upper Centaurus–Lupus sub-group in theScorpius–CentaurusOB association,the nearest such co-moving association of massive stars to the Sun.[7]
