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Star in the constellation Centaurus From Wikipedia, the free encyclopedia
C3 Centauri is a suspected astrometric binary[8] star system in the southern constellation of Centaurus. It has an orange hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.46.[2] The distance to this object is approximately 342 light years based on parallax.[1] It is a member of the Hyades Stream of co-moving stars.[9]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 11h 37m 33.98833s[1] |
Declination | −47° 44′ 50.2343″[1] |
Apparent magnitude (V) | +5.46[2] |
Characteristics | |
Spectral type | K2 III[3] |
B−V color index | +1.23±0.01[2] |
Astrometry | |
Radial velocity (Rv) | −0.18±0.40[1] km/s |
Proper motion (μ) | RA: -68.956[1] mas/yr Dec.: 16.362[1] mas/yr |
Parallax (π) | 9.5467 ± 0.1227 mas[1] |
Distance | 342 ± 4 ly (105 ± 1 pc) |
Details | |
Mass | 2.16[4] M☉ |
Radius | 15.85+0.30 −0.44[1] R☉ |
Luminosity | 95.8±1.5[1] L☉ |
Surface gravity (log g) | 2.12[5] cgs |
Temperature | 4,535+174 −43[1] K |
Metallicity [Fe/H] | 0.10[4] dex |
Rotational velocity (v sin i) | >1.0[6] km/s |
Other designations | |
Database references | |
SIMBAD | data |
The visible component of this system is an aging giant star with a stellar classification of K2 III,[3] which indicates it has exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has nearly sixteen[1] times the girth of the Sun. It is radiating 96[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,535 K.[1]
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