| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h22m 08.27124s[1] |
| Declination | −47° 55′ 40.0543″[1] |
| Apparent magnitude (V) | 5.01[2] |
| Characteristics | |
| Spectral type | F6 III-IV[3] |
| U−B color index | +0.04[2] |
| B−V color index | +0.50[2] |
| Astrometry | |
| Proper motion (μ) | RA: −141.19[1] mas/yr Dec.: −132.92[1] mas/yr |
| Parallax (π) | 27.89 ± 0.33 mas[1] |
| Distance | 117 ± 1 ly (35.9 ± 0.4 pc) |
| Absolute magnitude (MV) | +2.32[4] |
| Details | |
| Mass | 1.67[5] M☉ |
| Surface gravity (log g) | 3.87±0.10[5] cgs |
| Temperature | 6,447±80[5] K |
| Metallicity [Fe/H] | 0.17±0.05[5] dex |
| Rotational velocity (v sin i) | 2.8±0.2[4] km/s |
| Age | 2.0[5] Gyr |
| Other designations | |
ν1 Lup, CD−47° 9922, FK5 3211, HD 136351, HIP 75206, HR 5698, SAO 225703.[6] | |
| Database references | |
| SIMBAD | data |
Nu1 Lupi (ν1 Lup) is a solitary[7] star in the southern constellationofLupus. It is visible to the naked eye with an apparent visual magnitude of 5.01.[2] It is a high proper motion star[8] with an annual parallax shift of 27.89[1] mas as seen from Earth, yielding a distance estimate of 117 light years from the Sun.
This is a two[5] billion year old evolved star with a stellar classification of F6 III-IV,[3] indicating that the spectrum has characteristics intermediate between a subgiant and giant star. It is most likely the source of X-ray emission[8] detected at these coordinates with a luminosity of 1.09×1029 erg s−1.[9] The star has an estimated 1.67[5] times the mass of the Sun and is spinning slowly with a projected rotational velocity of 2.8 km/s.[4]
{{cite web}}: CS1 maint: postscript (link)
