| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 11h 37m 33.98833s[2] |
| Declination | −47° 44′ 50.2343″[2] |
| Apparent magnitude (V) | +5.46[1] |
| Characteristics | |
| Spectral type | K2 III[3] |
| B−Vcolor index | +1.23±0.01[1] |
| Astrometry | |
| Radial velocity (Rv) | −0.18±0.40[2] km/s |
| Proper motion (μ) | RA: −68.956[2]mas/yr Dec.: +16.362[2]mas/yr |
| Parallax (π) | 9.5467±0.1227 mas[2] |
| Distance | 342 ± 4 ly (105 ± 1 pc) |
| Absolute magnitude (MV) | +0.30[1] |
| Details | |
| Mass | 2.16[4] M☉ |
| Radius | 15.85+0.30 −0.44[2] R☉ |
| Luminosity | 95.8±1.5[2] L☉ |
| Surface gravity (log g) | 2.12[5] cgs |
| Temperature | 4,535+174 −43[2] K |
| Metallicity[Fe/H] | 0.10[4] dex |
| Rotational velocity (v sin i) | >1.0[6] km/s |
| Other designations | |
| C3 Cen,CD−47°6997,HD 101067,HIP 56700,HR 4476,SAO 222917[7] | |
| Database references | |
| SIMBAD | data |
C3 Centauri is a suspectedastrometric binary[8]star system in the southernconstellation ofCentaurus. It has an orange hue and is dimly visible to the naked eye with anapparent visual magnitude of +5.46.[1] The distance to this object is approximately 342 light years based onparallax.[2] It is a member of theHyades Stream of co-moving stars.[9]
The visible component of this system is an aginggiant star with astellar classification of K2 III,[3] which indicates it has exhausted the supply of hydrogen at itscore then cooled and expanded off themain sequence. At present it has 2.16 times the Sun's mass and with nearly sixteen[2] times thegirth of the Sun. It is radiating 96[2] times theluminosity of the Sun from its swollenphotosphere at aneffective temperature of 4,535 K.[2]
