a Librae (Zuben Elgenubi)

component year position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es)
AB 1823 314° 231'' 2.75 5.15 A3IV F4IV
AC 1987 291° 277.9'' 2.75 13.2 -
BC 1987 236° 112.5'' 5.15 13.2 -