| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 43m 39.44s[1] |
| Declination | −35° 10′ 25.2″[1] |
| Apparent magnitude (V) | +4.06[2] |
| Characteristics | |
| Spectral type | K3III[2] |
| U−B color index | +1.53 |
| B−V color index | +1.356[2] |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | −38 km/s |
| Proper motion (μ) | RA: -61.46 ± 0.15[1] mas/yr Dec.: -176.84 ± 0.14[1] mas/yr |
| Parallax (π) | 15.57 ± 0.16 mas[1] |
| Distance | 209 ± 2 ly (64.2 ± 0.7 pc) |
| Absolute magnitude (MV) | –0.20[2] |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 129456, also known by its Bayer designation c1 Centauri (c1 Cen), is a star in the constellation Centaurus. c¹ Centauri is an orange K-type giant with an apparent magnitude of +4.06. It is approximately 209 light years from Earth.