Gamma Librae

Gamma Librae
Location of γ Librae (circled)
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]
Distance163 ± 2 ly
(50.0 ± 0.5 pc)
Absolute magnitude (MV)−1.59[5]
Details[4]
γ Lib A
Mass1.15 M☉
Radius11.14 R☉
Luminosity72 L☉
Surface gravity (log g)2.81±0.18[6] cgs
Temperature4826±48[6] K
Metallicity [Fe/H]−0.26±0.03[6] dex
Rotational velocity (v sin i)1.60 km/s
Age4.31 Gyr
Other designations
Zubenelhakrabi, γ Lib, 38 Lib, BD−14° 4237, FK5 577, HD 138905, HIP 76333, HR 5787, SAO 159370, WDS J15355-1447A[7]
Database references
SIMBADdata

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.

The primary component (designated Gamma Librae A) has been formally named Zubenelhakrabi /zuːˌbɛnɛlˈhækrəbi/, the traditional name of the system.[9]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference pasj60_4_781 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Jofre2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c Marfil, E.; Tabernero, H. M.; Montes, D.; Caballero, J. A.; Soto, M. G.; González Hernández, J. I.; Kaminski, A.; Nagel, E.; Jeffers, S. V.; Reiners, A.; Ribas, I.; Quirrenbach, A.; Amado, P. J. (2020), "Stellar atmospheric parameters of FGK-type stars from high-resolution optical and near-infrared CARMENES spectra", Monthly Notices of the Royal Astronomical Society, 492 (4): 5470–5507, arXiv:2001.01495, doi:10.1093/mnras/staa058
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.