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Gamma Librae
Star in the constellation Libra / From Wikipedia, the free encyclopedia
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Gamma Librae (γ Librae, abbreviated Gamma Lib, γ Lib) is a suspected[8] binary star system in the constellation of Libra. It is visible to the naked eye, having an apparent visual magnitude of +3.91.[2] Based upon an annual parallax shift of 19.99 mas as seen from Earth, it lies 163 light years from the Sun.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Libra |
Right ascension | 15h 35m 31.57881s[1] |
Declination | −14° 47′ 22.3278″[1] |
Apparent magnitude (V) | +3.91[2] |
Characteristics | |
Spectral type | G8.5 III[3] |
Astrometry | |
Radial velocity (Rv) | −26.71[4] km/s |
Proper motion (μ) | RA: +65.34[1] mas/yr Dec.: +7.45[1] mas/yr |
Parallax (π) | 19.99 ± 0.20 mas[1] |
Distance | 163 ± 2 ly (50.0 ± 0.5 pc) |
Absolute magnitude (MV) | −1.59[5] |
Details[4] | |
γ Lib A | |
Mass | 1.15 M☉ |
Radius | 11.14 R☉ |
Luminosity | 72 L☉ |
Surface gravity (log g) | 2.81±0.18[6] cgs |
Temperature | 4826±48[6] K |
Metallicity [Fe/H] | −0.26±0.03[6] dex |
Rotational velocity (v sin i) | 1.60 km/s |
Age | 4.31 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Close
The primary component (designated Gamma Librae A) has been formally named Zubenelhakrabi /zuːˌbɛnɛlˈhækrəbi/, the traditional name of the system.[9]