Delta Centauri
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Centaurus |
| Right ascension | 12h08m21.5s |
| Declination | −50°43′21″ |
| Apparent magnitude (V) | +2.58 |
| Characteristics | |
| Spectral type | B2IVne |
| U-B color index | −0.90 |
| B-V color index | −0.12 |
| Variable type | γ Cas |
| Astrometry | |
| Radial velocity (Rv) | +11 km/s |
| Proper motion (μ) | RA: −47.53 mas/yr Dec.: −6.42 mas/yr |
| Parallax (π) | 8.25 ± 0.79 mas |
| Distance | 395 ly (121 pc) |
| Absolute magnitude (MV) | −2.82 |
| Other designations | |
Delta Centauri (δ Cen / δ Centauri) is a star in the constellation Centaurus. It is sometimes called by the traditional Chinese name 马尾 Ma Wei, meaning the Horse's Tail.
It has apparent magnitude +2.60 and is of spectral type B2IVne. It is classified as a Gamma Cassiopeiae type variable star and its brightness varies from magnitude +2.51 to +2.65.
This Be star shares a proper motion with the nearby stars HD 105382 and HD 105383, so they may form a small cluster or perhaps a triple star system.
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