Definition for Zubenelgenubi
From Biology Forums Dictionary
Alpha Librae (α Lib, α Librae), or Zubenelgenubi, is the second brightest star in the constellation Libra. Alpha2 Librae is 0.33 degree from the ecliptic so it can be easily occulted by the Moon and (very rarely) by planets. The next occultation by a planet will be by Mercury on 10 November 2052.