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Dictionary of Astrological and Astronomical Terms

Compiled by Julene Packer-Louis, Evan Bortnick, and Jackie Goldstein

Copyright 2000-2020 OCA, Inc. All rights reserved. No portion of the dictionary may be reproduced in any form without written permission.


Arabic Part (Lot)

The Arabic Parts are significant points on the ecliptic that are arithmetical constructs of two or more astrological components, such as planets or house cusps or other Parts.

For example, the Part of Fortune, the most commonly used Part, is determined by adding the longitude of the Moon to the longitude of the Ascendant and subtracting that from the longitude of the Sun. There are different formula applied when the birth time is nocturnal or diurnal.

There are an endless number of Parts (or Lots as they are sometimes called), for example, the Parts of Fortune, Death, Treachery, Journeys, Children etc. Parts may be viewed as sensitive points in the chart when being aspected by natal or transitting planets.

In traditional astrology the Parts were used extensively in Horary Astrology, as well as economic or natal astrology. The history of Parts stretches back to 300 BC, certainly pre-Arabic times according to ancient texts, and so are probably misnamed.

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