Nu Horologii
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Horologium |
| Right ascension | 02h 49m 01.487s |
| Declination | −62° 48′ 23.48″ |
| Apparent magnitude (V) | 5.253±0.006 |
| Characteristics | |
| Spectral type | A2 V |
| U−B color index | +0.06 |
| B−V color index | +0.10 |
| Astrometry | |
| Radial velocity (Rv) | 30.90 km/s |
| Proper motion (μ) | RA: 94.372 mas/yr Dec.: 28.564 mas/yr |
| Parallax (π) | 19.2611±0.0635 mas |
| Distance | 169.3 ± 0.6 ly (51.9 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.74 |
| Details | |
| Mass | 1.90±0.02 M☉ |
| Radius | 1.88 R☉ |
| Luminosity | 16.7 L☉ |
| Surface gravity (log g) | 3.96 cgs |
| Temperature | 8,308 K |
| Metallicity [Fe/H] | −0.05 dex |
| Rotational velocity (v sin i) | 143.7±1.4 km/s |
| Age | 540±90 Myr |
| Other designations | |
| ν Hor, CPD−63°188, FK5 2196, HD 17848, HIP 13141, HR 852, SAO 248656 | |
| Database references | |
| SIMBAD | data |
Nu Horologii, Latinized from ν Horologii, is the Bayer designation for a single star in the southern constellation of Horologium. It was catalogued by the Dutch explorer Frederick de Houtman in 1603. With an apparent visual magnitude of 5.3, this star can be seen with the naked eye from the southern hemisphere. (According to the Bortle scale, it can be seen at night from bright suburban skies.) Based upon parallax, Nu Horologii lies at a distance of 169 light-years from Earth. It is drifting closer to the Sun with a radial velocity of +31 km/s.