Delta Centauri
Delta Centauri, Latinized from δ Centauri, is a star in the southern constellation of Centaurus. The apparent visual magnitude of this star is +2.57, making it readily visible to the naked eye. Based upon parallax measurements, it is located at a distance of about 410 light-years (130 parsecs) from the Earth. The star is drifting further away with a radial velocity of +11 km/s.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 08m 21.49764s |
| Declination | −50° 43′ 20.7386″ |
| Apparent magnitude (V) | +2.57 (2.51 - 2.65) |
| Characteristics | |
| Spectral type | B2Vne or B2 IVne |
| U−B color index | −0.92 |
| B−V color index | −0.13 |
| Variable type | γ Cas |
| Astrometry | |
| Radial velocity (Rv) | +11 km/s |
| Proper motion (μ) | RA: −49.94 mas/yr Dec.: −7.19 mas/yr |
| Parallax (π) | 7.86 ± 0.47 mas |
| Distance | 410 ± 20 ly (127 ± 8 pc) |
| Absolute magnitude (MV) | −2.94 |
| Details | |
| Mass | 8.7±0.3 M☉ |
| Radius | 6.5 R☉ |
| Luminosity | 5,129 L☉ |
| Surface gravity (log g) | 3.92 cgs |
| Temperature | 22,360 K |
| Rotational velocity (v sin i) | 263±14 km/s |
| Age | 21.5±1.5 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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