Upsilon1 Centauri
Template:Other stars by Bayer designation
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | +3.87[2] |
| Characteristics | |
| Spectral type | B2 IV/V[3] |
| B−V Template:Engvar | Template:Val[2] |
| Astrometry | |
| Radial velocity (Rv) | Template:Val[4] km/s |
| Proper motion (μ) | RA: Template:Val[1] mas/yr Dec.: Template:Val[1] mas/yr |
| Parallax (π) | 7.63±0.16 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −1.72[2] |
| Details | |
| Mass | Template:Val[5] Template:Solar mass |
| Radius | Template:Val[6] Template:Solar radius |
| Luminosity | 1,884[2] Template:Solar luminosity |
| Surface gravity (log g) | Template:Val[6] cgs |
| Temperature | Template:Val[6] K |
| Rotational velocity (v sin i) | 124[4] km/s |
| Age | Template:Val[5] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
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Upsilon1 Centauri, Latinized from υ1 Centauri, is a single[8] star in the southern constellation of Centaurus. It has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +3.87.[2] The distance to this object is approximately 427 light years based on parallax,[1] and is receding with a radial velocity of +9 km/s.[4] It is a member of the Lower Centaurus Crux group of the Scorpius–Centaurus association.[2]
The stellar classification of this object is B2 IV/V,[2] matching a massive B-type star with a luminosity class displaying mixed traits of a main sequence and a subgiant star. It is 13[5] million years old and is spinning with a projected rotational velocity of 124 km/s.[4] The star has 7.9[5] times the mass of the Sun and 3.7[6] times the Sun's radius. It is radiating 1,884[2] times the luminosity of the Sun from its photosphere at an effective temperature of 21,411 K.[6]
References
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