Abraham Arzachel, a Jewish astronomer, born at Toledo, Spain, flourished about 1060. He wrote a work on the obliquity of the zodiac, and determined the apogee of the sun. The famous Alfonsine astronomical tables, prepared in 1252 by order of Alfonso X. of Castile, were derived in part from the writings of Arzachel. Several of his works are extant in Latin.