HD 129685

This article is about c2 Centauri. For C2 Centauri, see HD 100825. For other stars with this Bayer designation, see C Centauri.
c2 Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 14h 44m 59.20177s[1]
Declination −35° 11′ 30.5750″[1]
Apparent magnitude (V) +4.92[2]
Characteristics
Spectral type A0IVnn[3] or A0Vn[4]
B−V color index +0.013±0.006[2]
Astrometry
Radial velocity (Rv)−5.0±2.8[2] km/s
Proper motion (μ) RA: 9.255[1] mas/yr
Dec.: −3.943[1] mas/yr
Parallax (π)14.1199 ± 0.2091 mas[1]
Distance231 ± 3 ly
(71 ± 1 pc)
Absolute magnitude (MV)0.83[2]
Details
Mass2.10+0.12
−0.09[5] M☉
Luminosity44.73[2] L☉
Surface gravity (log g)3.80±0.14[5] cgs
Temperature9,323[6] K
Age239+143
−144[5] Myr
Other designations
c2 Cen, CD−34°9888, GC 19845, HD 129685, HIP 72104, HR 5489, SAO 205899[7]
Database references
SIMBADdata

HD 129685 is a single[8] star in the southern constellation of Centaurus. It is also known by its Bayer designation c2 Centauri, while HD 129685 is the star's identifier in the Henry Draper catalogue. This object has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.92.[2] It is located at a distance of approximately 231 light years from the Sun based on parallax, and it has an absolute magnitude of 0.83.[2] The star is drifting closer with a radial velocity of around −5 km/s.[2]

Two different stellar classifications have been reported for this star. A class of A0Vn[4] assigned by Abt and Morrell (1995) indicates it is a rapidly-rotating A-type main-sequence star, while a type of A0IVnn,[3] according to Gray and Garrison (1987), suggests it is a somewhat more evolved subgiant star. It is around 239 million years old with 2.1 times the mass of the Sun,[5] and is reported to be rotating close to its break-up velocity.[9] The star is radiating 45[2] times the luminosity of the Sun from its photosphere at an effective temperature of 9,323 K.[6]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray1987 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference gullikson2016 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference diBenedetto1998 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Molaro1984 was invoked but never defined (see the help page).