Upsilon1 Centauri
- 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
- 1 2 3 4 5 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
- 1 2 3 Fitzpatrick, E. L.; Massa, D. (March 2005), "Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry", The Astronomical Journal 129 (3): 1642–1662, arXiv:astro-ph/0412542, Bibcode:2005AJ....129.1642F, doi:10.1086/427855
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
This article is issued from Wikipedia - version of the Friday, January 31, 2014. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.