Ascending

A term loosely applied to any planet on the eastward side of the line between the cusps of the Fourth and Tenth Houses, which by the diurnal motion of the Earth is rising in the heavens. More precisely it applies to a planet on, or near, the eastern horizon, or in the First House. A planet oriental and matutine to the Sun is said to ascend to the Sun. One that is occidental and vespertine to the Moon is said to ascend to the Moon. Ptolemy describes the luminaries, when so placed, as guarded. 

DeVore, Nicholas. Encyclopedia of Astrology. New York: Philosophical Library, 1947.