Upsilon1 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) +3.788[2]
Characteristics
Spectral type B2 IV/V[2]
U−B color index −0.80
B−V color index −0.20
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
Distance427 ± 9 ly
(131 ± 3 pc)
Absolute magnitude (MV)−1.72[2]
Details
Radius3.74 ± 0.34[3] R☉
Luminosity1,884[2] L☉
Surface gravity (log g)4.15 ± 0.07[3] cgs
Temperature21,411 ± 377[3] K
Other designations
υ1 Cen, CD−44° 9010, FK5 3112, HD 121790, HIP 68282, HR 5249, SAO 224585
Database references
SIMBADdata

Upsilon1 Centauri, Latinized from 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. 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
  2. 1 2 3 4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  3. 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
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