A planet, to which a significator may be "directed" in order to form an aspect between the "progressed position" of the Significator and the "birth position" of the promittor, whereby certain events or conditions are promised as concerns the significator so directed. The distance the significator must travel to form this aspect is termed the "arc of direction," to be reduced to time, usually at the rate of 1° for a year and 5' for a month.
ASTROLABE ENCYCLOPEDIA
