Nu Mensae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Mensa |
| Right ascension | 04h 20m 58.0721s |
| Declination | −81° 34′ 47.719″ |
| Apparent magnitude (V) | 5.76±0.01 |
| Characteristics | |
| Spectral type | F0/2 III |
| U−B color index | +0.05 |
| B−V color index | +0.35 |
| Astrometry | |
| Radial velocity (Rv) | 9.1±2.8 km/s |
| Proper motion (μ) | RA: +10.182 mas/yr Dec.: +125.469 mas/yr |
| Parallax (π) | 18.4754±0.0273 mas |
| Distance | 176.5 ± 0.3 ly (54.13 ± 0.08 pc) |
| Absolute magnitude (MV) | +2.13 |
| Details | |
| Mass | 1.69 M☉ |
| Radius | 2.3 R☉ |
| Luminosity | 11.5 L☉ |
| Surface gravity (log g) | 3.94 cgs |
| Temperature | 6,921±139 K |
| Metallicity [Fe/H] | −0.08 dex |
| Rotational velocity (v sin i) | 108±5 km/s |
| Age | 1.7 Gyr |
| Other designations | |
| ν Mensae, 8 G. Mensae, CPD−81°115, GC 5418, HD 29116, HIP 20297, HR 1456, SAO 258378 | |
| Database references | |
| SIMBAD | data |
Nu Mensae, Latinized from ν Mensae, is a solitary star situated in the southern circumpolar constellation Mensa. It has an apparent magnitude of 5.76, making it faintly visible to the naked eye. The star is relatively close at a distance of 176 light years but is receding with a heliocentric radial velocity of 9.1 km/s.
Nu Mensae has a stellar classification of F0/2 III, indicating that it is a giant star with a spectrum intermediate between that of an F0 and F2 star. The star has an angular diameter of 0.41±0.03 mas, and a radius 2.39 times that of the Sun at its estimated distance. At present it has 169% the mass of the Sun and shines at 11.5 times the luminosity of the Sun at an effective temperature of 6,921 K, giving it a white glow with a yellow tint. Despite an age of 1.7 billion years, Nu Mensae spins rapidly with a projected rotational velocity of 108 km/s and is slightly metal deficient relative to the Sun.