Xi2 Centauri
- For other star systems with this Bayer designation, see Xi Centauri.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h 06m 54.64s[1] |
| Declination | −49° 54′ 22.5″[1] |
| Apparent magnitude (V) | +4.27 |
| Characteristics | |
| Spectral type | B1.5V |
| U−B color index | −0.79 |
| B−V color index | −0.19 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | +14 km/s |
| Proper motion (μ) | RA: -26.15 ± 0.23[1] mas/yr Dec.: -12.03 ± 0.15[1] mas/yr |
| Parallax (π) | 6.98 ± 0.24 mas[1] |
| Distance | 470 ± 20 ly (143 ± 5 pc) |
| Absolute magnitude (MV) | −1.23 |
| Other designations | |
| Database references | |
| SIMBAD | data |
Xi2 Centauri (ξ2 Cen, ξ2 Centauri) is a double star in the constellation Centaurus. It is approximately 470 light years from Earth.
The primary component, ξ2 Centauri A, is a blue-white B-type main sequence dwarf with an apparent magnitude of +4.27. Its companion, ξ2 Centauri B, is a tenth magnitude yellow-white F-type dwarf. The two stars share a common proper motion, indicating they may be gravitationally bound.
References
- ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- http://server3.wikisky.org/starview?object_type=1&object_id=884
- http://www.alcyone.de/cgi-bin/search.pl?object=HR4942
- http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HR+4942&submit=SIMBAD+search
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