b Cephei (Alfirk)

component year position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es)
Aa 1971 48° 0,3'' 3,2 - B2III
1990 51° 0,1''
Aa-B 1832 251° 13,4'' 3,2 7,8 -
1975 249° -