Omicron2 Centauri
For other star systems with this Bayer designation, see Omicron Centauri.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 31m 48.80s[1] |
| Declination | −59° 30′ 56.3″[1] |
| Apparent magnitude (V) | +5.12 |
| Characteristics | |
| Spectral type | A2Ia |
| U−B color index | −0.11 |
| B−V color index | +0.49 |
| Variable type | α Cyg |
| Astrometry | |
| Radial velocity (Rv) | −17 km/s |
| Proper motion (μ) | RA: -6.89 ± 0.26[1] mas/yr Dec.: 1.12 ± 0.24[1] mas/yr |
| Parallax (π) | 0.61 ± 0.28[1] mas |
| Distance | approx. 5,000 ly (approx. 1,600 pc) |
| Absolute magnitude (MV) | −4.96 |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omicron2 Centauri (ο2 Cen, ο2 Centauri) is a star in the constellation Centaurus.
ο2 Centauri is a white A-type supergiant with a mean apparent magnitude of +5.12. It is approximately 5000 light years from Earth. It is classified as an Alpha Cygni type variable star and its brightness varies from magnitude +5.12 to +5.22 with a period of 46.3 days.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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
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