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Astro*Dictionary by Michael Erlewine





1 article for "Modus Rationalis"

Modus Rationalis [DeVore]

A term applied by Regiomontanus to his method of locating the cusps of the intermediate Houses – those which lie between the angular Houses of a Figure-by dividing the Ecliptic by the Equator instead of the semi-arc. Its division into twelve equal parts was accomplished by circles, the cusps located where the circles cut the plane of the Ecliptic. The method has been superceded by one employing Oblique Ascension under the Poles of the Houses for all but the 4th and 10th cusps. v. House Division.


See also:
♦ Houses


Astro*Index Copyright © 1997 Michael Erlewine