HD 111968

This article is about n Centauri. Not to be confused with N Centauri.
n Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 12h 53m 26.20s[1]
Declination −40° 10′ 43.9″[1]
Apparent magnitude (V) +4.25[2]
Characteristics
Spectral type A7IV[3] or A7V[4]
B−V color index +0.224±0.014[2]
Astrometry
Proper motion (μ) RA: +70.84±0.14[1] mas/yr
Dec.: −22.54±0.10[1] mas/yr
Parallax (π)21.95 ± 0.19 mas[1]
Distance149 ± 1 ly
(45.6 ± 0.4 pc)
Absolute magnitude (MV)+0.86[5]
Details
Mass1.62[6] M☉
Luminosity34.34[2] L☉
Surface gravity (log g)3.87±0.14[6] cgs
Temperature7,835±266[6] K
Rotational velocity (v sin i)92.4±4.6[5] km/s
Age401[6] Myr
Other designations
n Cen, CD−39° 7893, FK5 482, GC 17489, GJ 488.1, HD 111968, HIP 62896, HR 4889, SAO 203907[7]
Database references
SIMBADdata

HD 111968, also known by the Bayer designation n Centauri, is a single[8] star in the southern constellation of Centaurus. It is a white-hued star that is faintly visible to the naked eye with an apparent visual magnitude of +4.25.[2] The star is located at a distance of approximately 149 light years from the Sun based on parallax.[1] The radial velocity of the star is poorly constrained, with an estimated value of 2.5 km/s.[2]

This is classified as an A-type star but there has been disagreement about the luminosity class. A. de Vaucouleurs in 1957 found a class of III, suggesting this is an evolved giant star.[9] O. J. Eggen gave a class of V in 1962,[10] as did R. O. Gray and R. F. Garrison in 1989,[4] indicating this is a main sequence star. In 1979, N. Houk found a class of IV,[3] meaning this is a subgiant star.

HD 111968 is a young star, some 400 million years old, with 1.6 times the mass of the Sun.[6] It is spinning with a projected rotational velocity of 92 km/s.[5] The star is radiating 34[2] times the luminosity of the Sun from its photosphere at an effective temperature of 7,835 K.[6]

  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 Anderson_Francis_2012 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 Gray_Garrison_1989 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference vonEiff2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference David_Hillenbrand_2015 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 Eggleton_Tokovinin_2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference de_Vaucouleurs1957 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggen1962 was invoked but never defined (see the help page).