G Centauri

This article is about G Centauri. For g Centauri, see 2 Centauri.
G Centauri
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 12h 26m 31.75955s[1]
Declination −51° 27′ 02.2899″[1]
Apparent magnitude (V) 4.82[2]
Characteristics
Spectral type B3V(n)[3]
B−V color index −0.141±0.002[2]
Astrometry
Radial velocity (Rv)+5.0±4.2[2] km/s
Proper motion (μ) RA: −30.66[1] mas/yr
Dec.: −10.13[1] mas/yr
Parallax (π)7.28 ± 0.24 mas[1]
Distance450 ± 10 ly
(137 ± 5 pc)
Absolute magnitude (MV)−0.87[2]
Details
Mass6.2±0.1[4] M☉
Radius3.42[5] R☉
Luminosity483.06[2] L☉
Temperature13,732[6] K
Metallicity [Fe/H]−0.38±0.06[7] dex
Rotational velocity (v sin i)298±12[8] km/s
Age15.8±0.2[4] Myr
Other designations
G Cen, CD−50°6975, GC 16954, HD 108257, HIP 60710, HR 4732, SAO 239948, CCDM J12265-5127[9]
Database references
SIMBADdata

G Centauri is a single[10] star in the southern constellation of Centaurus. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of +4.82. This object is located approximately 450 light years from the Sun, based on parallax.[1] It is a member of the Lower Centaurus–Crux group of the Scorpius–Centaurus association, with the former having an age of about 17 million years.[11]

This object is a B-type main-sequence star with a stellar classification of B3V(n),[3] where the 'n' indicates "nebulous" (broad) lines due to rapid rotation. It is around 16[4] million years old with a projected rotational velocity of up to 298 km/s.[8] The star has six[4] times the mass of the Sun and 3.4[5] times the Sun's radius. It is radiating 483[2] times the luminosity of the Sun from its photosphere at an effective temperature of 13,732 K.[6] An infrared excess indicates a circumstellar disk of dust with a mean temperature of 50 K is orbiting the star at a separation of 717.8 AU.[5]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 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 houk1978 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Cotten2016 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference gaspar2016 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference brown1997 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Condell2015 was invoked but never defined (see the help page).