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] |
Distance | 149 ± 1 ly (45.6 ± 0.4 pc) |
Absolute magnitude (MV) | +0.86[5] |
Details | |
Mass | 1.62[6] M☉ |
Luminosity | 34.34[2] L☉ |
Surface gravity (log g) | 3.87±0.14[6] cgs |
Temperature | 7,835±266[6] K |
Rotational velocity (v sin i) | 92.4±4.6[5] km/s |
Age | 401[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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]
van Leeuwen2007
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was invoked but never defined (see the help page).Eggleton_Tokovinin_2008
was invoked but never defined (see the help page).de_Vaucouleurs1957
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was invoked but never defined (see the help page).