Omicron1 Centauri
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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 46.07s[1] |
| Declination | −59° 26′ 31.4″[1] |
| Apparent magnitude (V) | +5.07 |
| Characteristics | |
| Spectral type | G30-Ia |
| U−B color index | +0.78 |
| B−V color index | +1.08 |
| Variable type | semiregular |
| Astrometry | |
| Radial velocity (Rv) | −20 km/s |
| Proper motion (μ) | RA: -4.31 ± 0.28[1] mas/yr Dec.: 1.72 ± 0.28[1] mas/yr |
| Parallax (π) | 0.57 ± 0.32[1] mas |
| Distance | approx. 6,000 ly (approx. 1,800 pc) |
| Absolute magnitude (MV) | −4.90 |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omicron1 Centauri (ο1 Cen, ο1 Centauri) is a star in the constellation Centaurus. It is approximately 6000 light years from Earth.
ο1 Centauri is a yellow G-type supergiant with a mean apparent magnitude of +5.07. It is classified as a semiregular variable star and its brightness varies from magnitude +5.8 to +6.6 with a period of 200 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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