HD 100673

Not to be confused with Alpha Centauri. For a Centauri, see HD 125823.
HD 100673
Diagram showing star positions and boundaries of the Centaurus constellation and its surroundings
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[2]
Characteristics
Evolutionary stage Main sequence[3]
Spectral type B9V[4]
U−B color index −0.21
B−V color index −0.077±0.005[2]
Astrometry
Radial velocity (Rv)+5.7±2.2[2] 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 mas[1]
Distance430 ± 10 ly
(131 ± 4 pc)
Absolute magnitude (MV)−0.96[2]
Details
Mass3.58±0.05[3] M☉
Radius2.4–3.1[5] R☉
Luminosity306[3] L☉
Temperature10,600[3] K
Rotational velocity (v sin i)160[3] km/s
Other designations
A Cen, CPD−53°4637, FK5 2926, GC 15877, HD 100673, HIP 56480, HR 4460, SAO 239189[6]
Database references
SIMBADdata

A Centauri is a single[7] star in the southern constellation of Centaurus. It is blue-white in hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.62.[2] The star is located at a distance of approximately 430 light-years from the Sun based on stellar parallax.[1] It appears to be drifting further away with a radial velocity of around +6 km/s.[2]

This is a rapidly rotating Be star, showing an emission-line spectrum on top of the normal absorption spectrum of the star, due to a circumstellar disk of ejected matter. It doesn't show any absorption lines from the disk.[8] It is a B-type main-sequence star with a stellar classification of B9V.[4]

  1. ^ a b c d e f Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1979 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference CADARS was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference hanuschik1996 was invoked but never defined (see the help page).