Ascensional Difference. The difference between the Right Ascension of any body and its Oblique Ascension: used chiefly as expressing the difference in time between the rising or setting of a celestial body, and six o'clock; or, ...
Ascensional Difference.
Oblique Ascension.
(O.A.) As it rises, a star or planet, not on the equator, forms an angle with that part of the equator which is rising at the same time. This is called its Ascensional difference. (A.D.) This A.D.
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Oblique Ascension: A measurement determined by the angle (ascensional difference) between the point on the celestial equator rising with a planet rising at a point not at the equator.
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 See also: Celestial, Equator, Planet, Rising, House
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