Nu Ophiuchi
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 59m 01.59191s |
| Declination | −09° 46′ 25.081″ |
| Apparent magnitude (V) | +3.332 |
| Characteristics | |
| Spectral type | K0 IIIa CN –1 |
| U−B color index | +0.873 |
| B−V color index | +0.999 |
| Astrometry | |
| Radial velocity (Rv) | 13.19±0.04 km/s |
| Proper motion (μ) | RA: −9.48 mas/yr Dec.: −116.69 mas/yr |
| Parallax (π) | 21.64±0.26 mas |
| Distance | 151 ± 2 ly (46.2 ± 0.6 pc) |
| Absolute magnitude (MV) | –0.19 |
| Details | |
| Mass | 2.88±0.12 M☉ |
| Radius | 13.85±0.17 R☉ |
| Luminosity | 108.2±6 L☉ |
| Surface gravity (log g) | 2.60±0.03 cgs |
| Temperature | 5,000±63 K |
| Metallicity [Fe/H] | 0.05±0.07 dex |
| Rotational velocity (v sin i) | 2.1 km/s |
| Age | 450±70 Myr |
| Other designations | |
| Sinistra, 64 Ophiuchi, BD−09 4632, FK5 673, HD 163917, HIP 88048, HR 6698, SAO 142004, 2MASS J17590160-0946249 | |
| Database references | |
| SIMBAD | data |
Nu Ophiuchi (ν Oph, ν Ophiuchi) is a star in the equatorial constellation of Ophiuchus. The apparent visual magnitude is +3.3, making it one of the brighter members of this constellation. Based upon parallax measurements made by the Hipparcos satellite, this star is located at a distance of about 150 light-years (46 parsecs).