HD 111968
HD 111968, also known by the Bayer designation n Centauri, is a single 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. The star is located at a distance of approximately 149 light years from the Sun based on parallax. The radial velocity of the star is poorly constrained, with an estimated value of 2.5 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 53m 26.20s |
| Declination | −40° 10′ 43.9″ |
| Apparent magnitude (V) | +4.25 |
| Characteristics | |
| Spectral type | A7IV or A7V |
| B−V color index | +0.224±0.014 |
| Astrometry | |
| Proper motion (μ) | RA: +70.84±0.14 mas/yr Dec.: −22.54±0.10 mas/yr |
| Parallax (π) | 21.95 ± 0.19 mas |
| Distance | 149 ± 1 ly (45.6 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.86 |
| Details | |
| Mass | 1.62 M☉ |
| Luminosity | 34.34 L☉ |
| Surface gravity (log g) | 3.87±0.14 cgs |
| Temperature | 7,835±266 K |
| Rotational velocity (v sin i) | 92.4±4.6 km/s |
| Age | 401 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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. O. J. Eggen gave a class of V in 1962, as did R. O. Gray and R. F. Garrison in 1989, indicating this is a main sequence star. In 1979, N. Houk found a class of IV, 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. It is spinning with a projected rotational velocity of 92 km/s. The star is radiating 34 times the luminosity of the Sun from its photosphere at an effective temperature of 7,835 K.