C3 Centauri

For other star systems with this Bayer designation, see C Centauri.
C3 Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 11h 37m 33.98833s[1]
Declination −47° 44′ 50.2343″[1]
Apparent magnitude (V) +5.46[2]
Characteristics
Spectral type K2 III[3]
B−V color index +1.23±0.01[2]
Astrometry
Radial velocity (Rv)−0.18±0.40[1] km/s
Proper motion (μ) RA: -68.956[1] mas/yr
Dec.: 16.362[1] mas/yr
Parallax (π)9.5467 ± 0.1227 mas[1]
Distance342 ± 4 ly
(105 ± 1 pc)
Details
Mass2.16[4] M☉
Radius15.85+0.30
−0.44[1] R☉
Luminosity95.8±1.5[1] L☉
Surface gravity (log g)2.12[5] cgs
Temperature4,535+174
−43[1] K
Metallicity [Fe/H]0.10[4] dex
Rotational velocity (v sin i)>1.0[6] km/s
Other designations
C3 Cen, CD−47°6997, HD 101067, HIP 56700, HR 4476, SAO 222917[7]
Database references
SIMBADdata

C3 Centauri is a suspected astrometric binary[8] star system in the southern constellation of Centaurus. It has an orange hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.46.[2] The distance to this object is approximately 342 light years based on parallax.[1] It is a member of the Hyades Stream of co-moving stars.[9]

The visible component of this system is an aging giant star with a stellar classification of K2 III,[3] which indicates it has exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has nearly sixteen[1] times the girth of the Sun. It is radiating 96[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,535 K.[1]

  1. ^ a b c d e f g h i j k l m Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference charbonnel2020 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference starhorse was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference demedeiros2014 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 Eggen1985 was invoked but never defined (see the help page).