Delta Centauri
B-type main sequence star in the constellation Centaurus / From Wikipedia, the free encyclopedia
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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,[2] 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.[1] The star is drifting further away with a radial velocity of +11 km/s.[6]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Centaurus |
Right ascension | 12h 08m 21.49764s[1] |
Declination | −50° 43′ 20.7386″[1] |
Apparent magnitude (V) | +2.57[2] (2.51 - 2.65[3]) |
Characteristics | |
Spectral type | B2Vne[4] or B2 IVne[5] |
U−B color index | −0.92[2] |
B−V color index | −0.13[2] |
Variable type | γ Cas[3] |
Astrometry | |
Radial velocity (Rv) | +11[6] km/s |
Proper motion (μ) | RA: −49.94[1] mas/yr Dec.: −7.19[1] mas/yr |
Parallax (π) | 7.86 ± 0.47 mas[1] |
Distance | 410 ± 20 ly (127 ± 8 pc) |
Absolute magnitude (MV) | −2.94[7] |
Details | |
Mass | 8.7±0.3[4] M☉ |
Radius | 6.5[8] R☉ |
Luminosity | 5,129[4] L☉ |
Surface gravity (log g) | 3.92[8] cgs |
Temperature | 22,360[8] K |
Rotational velocity (v sin i) | 263±14[9] km/s |
Age | 21.5±1.5[10] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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