Chi Centauri
Chi Centauri (χ Cen, χ Centauri) is a star in the constellation Centaurus.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 06m 02.77s |
| 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 | |
| Database references | |
| SIMBAD | data |
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.
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