F Centauri

For f Centauri, see HD 113703.
F Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 12h 18m 59.76635s[1]
Declination −55° 08′ 34.7346″[1]
Apparent magnitude (V) +5.01[2]
Characteristics
Spectral type M1III[3]
B−V color index 1.600±0.008[2]
Variable type suspected[4]
Astrometry
Radial velocity (Rv)−7.1±2.8[2] km/s
Proper motion (μ) RA: -79.258[1] mas/yr
Dec.: -15.215[1] mas/yr
Parallax (π)7.3256 ± 0.1919 mas[1]
Distance450 ± 10 ly
(137 ± 4 pc)
Absolute magnitude (MV)−0.87[2]
Details
Radius47.9+3.9
−6.3[1] R☉
Luminosity502±15[1] L☉
Temperature3,948+287
−151[1] K
Other designations
F Cen, NSV 5544, CPD−54°5113, FK5 2985, GC 16792, HD 107079, HIP 60059, HR 4682, SAO 239838, CCDM J12190-5509[5]
Database references
SIMBADdata

F Centauri is a suspected astrometric binary[6] star system in the southern constellation of Centaurus. It has a reddish hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around +5.01.[2] The system is located at a distance of approximately 450 light years from the Sun based on parallax, and it has an absolute magnitude of −0.87.[2] O. J. Eggen flagged this star as a member of the Hyades Supercluster.[7]

The visible component is an aging red giant star on the asymptotic giant branch[8] with a stellar classification of M1III,[3] indicating it has exhausted the supply of both hydrogen and helium at its core and is cooling and expanding. It is a suspected variable star of unknown type that has been measured ranging in brightness from visual magnitude 4.94 down to 5.07.[4] At present it has 48 times the radius of the Sun. It is radiating 502 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,948 K.[1]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 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 Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggen1983 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).