HD 125823

HD 125823, also known as V761 Centauri or a Centauri, is a star in the constellation Centaurus. It is a blue-white B-type giant with a mean apparent magnitude of +4.41. It is approximately 460 light years from Earth. It is classified as an SX Arietis type variable star and its brightness varies from magnitude +4.38 to +4.43 with a period of 8.82 days.

This article is about "a Centauri". For "A Centauri", see A Centauri. For "α Centauri", see Alpha Centauri.
HD 125823
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension  14h 23m 02.24s[1]
Declination −39° 30′ 42.5″[1]
Apparent magnitude (V) +4.41
Characteristics
Spectral type B7IIIp
U−B color index −0.75
B−V color index −0.18
Variable type SX Ari
Astrometry
Radial velocity (Rv)+8 km/s
Proper motion (μ) RA: -24.15 ± 0.13[1] mas/yr
Dec.: -21.90 ± 0.13[1] mas/yr
Parallax (π)7.13 ± 0.16[1] mas
Distance460 ± 10 ly
(140 ± 3 pc)
Absolute magnitude (MV)−1.27[2]
Details
Mass5.69 ± 0.30[2] M☉
Radius3.7 ± 0.5[2] R☉
Luminosity1,175[2] L☉
Surface gravity (log g)4.20 ± 0.12[2] cgs
Temperature17,700[2] K
Rotation8.817744 days[2]
Other designations
V761 Centauri, a Centauri, CD−38 9329, HD 125823, HIP 70300, HR 5378, SAO 205497.
Database references
SIMBADdata

References
  1. 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. North, P. (June 1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics, 334: 181–187, arXiv:astro-ph/9802286, Bibcode:1998A&A...334..181N


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