Omicron¹ Centauri
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For other star systems with this Bayer designation, see Omicron Centauri.
| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Centaurus |
| Right ascension | 11h31m46.1s |
| Declination | −59°26′32″ |
| 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: −4.08 mas/yr Dec.: 1.14 mas/yr |
| Parallax (π) | 1.01 ± 0.58 mas |
| Distance | 3200 ± 1900 ly (990 ± 570 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 3200 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.
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