A term used by Ptolemy in connection with a method of direction, effected by proportion of horary times - semi-arcs. One must distinguish between the Prorogator, the body directed and the Prorogation or method by which it is directed. The Prorogator is the Apheta or Life Giver, in contrast to the Anareta. By day and in aphetical places, the Sun holds the position of Prorogator; by night the Moon. (v. "Hyleg.")
ASTROLABE ENCYCLOPEDIA
