Nu Ophiuchi
Star in the constellation Ophiuchus / From Wikipedia, the free encyclopedia
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Nu Ophiuchi (ν Oph, ν Ophiuchi) is a star in the equatorial constellation of Ophiuchus. The apparent visual magnitude is +3.3,[2] making it one of the brighter members of this constellation. Based upon parallax measurements made during the Hipparcos mission, this star is located about 151 light-years (46 parsecs) from Earth.[1]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ophiuchus |
Right ascension | 17h 59m 01.59191s[1] |
Declination | −09° 46′ 25.0798″[1] |
Apparent magnitude (V) | +3.332[2] |
Characteristics | |
Spectral type | K0 IIIa CN –1[3] |
U−B color index | +0.873[2] |
B−V color index | +0.999[2] |
Astrometry | |
Radial velocity (Rv) | 12.95 ± 0.41[4] km/s |
Proper motion (μ) | RA: –9.48[1] mas/yr Dec.: –116.69[1] mas/yr |
Parallax (π) | 21.64 ± 0.26 mas[1] |
Distance | 151 ± 2 ly (46.2 ± 0.6 pc) |
Absolute magnitude (MV) | –0.19[5] |
Details | |
Mass | 3.04[6] M☉ |
Radius | 14[4] R☉ |
Luminosity | 123[6] L☉ |
Surface gravity (log g) | 2.7[4] cgs |
Temperature | 4,928[6] K |
Metallicity [Fe/H] | 0.02[4] dex |
Rotational velocity (v sin i) | 2.1[4] km/s |
Age | 330[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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