Nu1 Lupi (ν1 Lup) is a solitary[7] star in the southern constellation of Lupus. 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.
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 22m 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 | |
Database references | |
SIMBAD | data |
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]
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