  | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 11h 51m 08.69149s[2] |
| Declination | −45° 10′ 24.4890″[2] |
| Apparent magnitude (V) | +4.47[1] |
| Characteristics | |
| Spectral type | K3III[3] |
| B−Vcolor index | +1.283±0.052[1] |
| Astrometry | |
| Radial velocity (Rv) | +2.2±2.7[1] km/s |
| Proper motion (μ) | RA: -73.088[2]mas/yr Dec.: -8.170[2]mas/yr |
| Parallax (π) | 7.4043±0.1863 mas[2] |
| Distance | 440 ± 10 ly (135 ± 3 pc) |
| Absolute magnitude (MV) | −1.14[1] |
| Details | |
| Mass | 1.16[4] M☉ |
| Radius | 39.0+1.2 −5.4[2] R☉ |
| Luminosity | 480±14[2] L☉ |
| Surface gravity (log g) | 1.32[4] cgs |
| Temperature | 4,325+251 −65[2] K |
| Metallicity[Fe/H] | −0.03[4] dex |
| Other designations | |
| B Cen,CD−44°7614,FK5 446,GC 16226,HD 102964,HIP 57803,HR 4546,SAO 223062[5] | |
| Database references | |
| SIMBAD | data |
HD 102964, also known asB Centauri, is a single[6]star in the southernconstellation ofCentaurus. It has the identifierHD 102964 in theHenry Draper catalogue;B Centauri is the star'sBayer designation.[5] This object has an orange hue and is faintly visible to the naked eye with anapparent visual magnitude of +4.47.[1] The star is located at a distance of approximately 440 light years from theSun based onparallax,[2] and has anabsolute magnitude of −1.14.[1]
This object is an aginggiant star with astellar classification of K3III,[3] indicating the star has exhausted the supply of hydrogen at itscore then cooled and expanded off themain sequence. At present it has 39 times thegirth of the Sun. It is radiating 480 times theluminosity of the Sun from its enlargedphotosphere at aneffective temperature of 4,325 K.[2]
