Upsilon1 Centauri
From Infogalactic: the planetary knowledge core
- For other star systems with this Bayer designation, see Upsilon Centauri.
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h 58m 40.75s[1] |
| Declination | −44° 48′ 12.9″[1] |
| Apparent magnitude (V) | +3.87 |
| Characteristics | |
| Spectral type | B2IV-V |
| U−B color index | −0.80 |
| B−V color index | −0.20 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | +5 km/s |
| Proper motion (μ) | RA: -27.51 ± 0.15[1] mas/yr Dec.: -22.44 ± 0.13[1] mas/yr |
| Parallax (π) | 7.63 ± 0.16[1] mas |
| Distance | 427 ± 9 ly (131 ± 3 pc) |
| Absolute magnitude (MV) | −1.66 |
| Details | |
| Radius | 3.74 ± 0.34[2] R☉ |
| Surface gravity (log g) | 4.15 ± 0.07[2] cgs |
| Temperature | 21,411 ± 377[2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Upsilon1 Centauri (υ1 Cen, υ1 Centauri) is the Bayer designation for a star in the constellation Centaurus.
υ1 Centauri is a blue-white B-type subgiant with an apparent magnitude of +3.87. It is approximately 427 light years from Earth.
References
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