| Observation data EpochJ2000 EquinoxJ2000 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 12h 25m 21.73454s[2] |
| Declination | −35° 11′ 11.0985″[2] |
| Apparent magnitude (V) | 5.71[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | B9 IV/V[4] |
| B−Vcolor index | −0.06[5] |
| Astrometry | |
| Radial velocity (Rv) | −11.3[6] km/s |
| Proper motion (μ) | RA: −41,277[2]mas/yr[2] Dec.: −6.379mas/yr[2] |
| Parallax (π) | 7.1919±0.0668 mas[2] |
| Distance | 454 ± 4 ly (139 ± 1 pc) |
| Absolute magnitude (MV) | 0.07[1] |
| Details | |
| Mass | 3.1[7] M☉ |
| Radius | 2.8[7] R☉ |
| Luminosity | 141[7] L☉ |
| Surface gravity (log g) | 4.02[7] cgs |
| Temperature | 111,794[7] K |
| Rotation | 7.26 days[8] |
| Age | 258[2] Myr |
| Other designations | |
| x2 Cen,CD−34°8146,GC 16938,HD 108114,HIP 60610,HR 4724,SAO 203450[9] | |
| Database references | |
| SIMBAD | data |
x2 Centauri is a blue-whitestar located in theconstellationCentaurus. Its name is aBayer designation; it is also known by its designationsHD 108114 andHR 4724. Theapparent magnitude of thestar is about 5.7, meaning it is only visible to the naked eye underexcellent viewing conditions. Its distance is about 454light-years (139 pc), based onparallax measurements.
x2 Centauri'sspectral type is B9IV/V, meaning it displays blended properties of a lateB-type main sequence star and asubgiant. It is an estimated 258 million years old,[2] and is spinning with arotation period of 7.26 days days.[8] This star has 3.1 times the mass of the Sun and 2.8 times the Sun's radius.[7] It is radiating 141[7] times the luminosity of the Sun from itsphotosphere at aneffective temperature of 111,794 K.[7]
The starx1 Centauri, which lies at anangular separation of 0.4′ from x2 Centauri, may or may not form a physicalbinary star system with x2 Centauri, as the two have similarproper motions and distances.[10]
