z Orionis (Alnitak)

component year position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es) AB 1822 151° 2.3'' 2 4.2 O9.5Ibe 1990 166° - AC 1880 10° 57.6'' 2 10 - BC 1909 8° 59.7'' 4.2 8.5 B0 HR 1948 (Component A) HR 1949 (Component B)