Upsilon1 Centauri

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For other star systems with this Bayer designation, see Upsilon Centauri.
υ1 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
CD−44°9010, FK5 3112, HD 121790, HIP 68282, HR 5249, SAO 224585.
Database references
SIMBAD data

Upsilon1 Centauri1 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[edit]

  1. ^ a b c d e 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
  2. ^ a b c 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