A Centauri

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A Centauri
Diagram showing star positions and boundaries of the Centaurus constellation and its surroundings
Cercle rouge 100%.svg
Location of A Centauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension  11h 34m 45.66s[1]
Declination −54° 15′ 50.7″[1]
Apparent magnitude (V) +4.62
Spectral type B9Ve
U−B color index −0.21
B−V color index −0.08
Variable type none
Radial velocity (Rv)+3 km/s
Proper motion (μ) RA: -56.17 ± 0.18[1] mas/yr
Dec.: 16.19 ± 0.20[1] mas/yr
Parallax (π)7.65 ± 0.22[1] mas
Distance430 ± 10 ly
(131 ± 4 pc)
Absolute magnitude (MV)−1.13
Mass3.58 ± 0.05[2] M
Radius2.4-3.1[3] R
Luminosity306[2] L
Temperature10,600[2] K
Rotational velocity (v sin i)160[2] km/s
Other designations
HR 4460, HD 100673, CP−53°4637, FK5 2926, HIP 56480, SAO 239189, GC 15877
Database references

A Centauri (A Cen) is a star in the constellation Centaurus. It is a blue-white B-type main sequence dwarf with an apparent magnitude of +4.62 and is approximately 430 light years from Earth.

External links[edit]

  • Wikisky image of HD 100673 (A Centauri)


  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 d Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
  3. ^ Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics. 367 (2): 521–24. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.