Nu1 Lupi
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 22m 08.27124s |
| Declination | −47° 55′ 40.0543″ |
| Apparent magnitude (V) | 5.01 |
| Characteristics | |
| Spectral type | F6 III-IV |
| U−B color index | +0.04 |
| B−V color index | +0.50 |
| Astrometry | |
| Proper motion (μ) | RA: −141.19 mas/yr Dec.: −132.92 mas/yr |
| Parallax (π) | 27.89±0.33 mas |
| Distance | 117 ± 1 ly (35.9 ± 0.4 pc) |
| Absolute magnitude (MV) | +2.32 |
| Details | |
| Mass | 1.67 M☉ |
| Surface gravity (log g) | 3.87±0.10 cgs |
| Temperature | 6,447±80 K |
| Metallicity [Fe/H] | 0.17±0.05 dex |
| Rotational velocity (v sin i) | 2.8±0.2 km/s |
| Age | 2.0 Gyr |
| Other designations | |
| ν1 Lup, CD−47°9922, FK5 3211, HD 136351, HIP 75206, HR 5698, SAO 225703 | |
| Database references | |
| SIMBAD | data |
Nu1 Lupi (ν1 Lup) is a solitary star in the southern constellation of Lupus. It is visible to the naked eye with an apparent visual magnitude of 5.01. It is a high proper motion star with an annual parallax shift of 27.89 mas as seen from Earth, yielding a distance estimate of 117 light years from the Sun.
This is a two billion year old evolved star with a stellar classification of F6 III-IV, indicating that the spectrum has characteristics intermediate between a subgiant and giant star. It is most likely the source of X-ray emission detected at these coordinates with a luminosity of 1.09×1029 erg s−1. The star has an estimated 1.67 times the mass of the Sun and is spinning slowly with a projected rotational velocity of 2.8 km/s.