HD 102964
HD 102964, also known as B Centauri, is a single star in the southern constellation of Centaurus. It has the identifier HD 102964 in the Henry Draper catalogue; B Centauri is the star's Bayer designation. This object has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.47. The star is located at a distance of approximately 440 light years from the Sun based on parallax, and has an absolute magnitude of −1.14.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 51m 08.69149s |
| Declination | −45° 10′ 24.4890″ |
| Apparent magnitude (V) | +4.47 |
| Characteristics | |
| Spectral type | K3III |
| B−V color index | +1.283±0.052 |
| Astrometry | |
| Radial velocity (Rv) | +2.2±2.7 km/s |
| Proper motion (μ) | RA: -73.088 mas/yr Dec.: -8.170 mas/yr |
| Parallax (π) | 7.4043 ± 0.1863 mas |
| Distance | 440 ± 10 ly (135 ± 3 pc) |
| Absolute magnitude (MV) | −1.14 |
| Details | |
| Mass | 1.16 M☉ |
| Radius | 39.02+1.20 −5.37 R☉ |
| Luminosity | 480.1±13.8 L☉ |
| Surface gravity (log g) | 1.32 cgs |
| Temperature | 4,325+251 −65 K |
| Metallicity [Fe/H] | −0.03 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is an aging giant star with a stellar classification of K3III, indicating the star has exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has 39 times the girth of the Sun. It is radiating 480 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,325 K.