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Dictionary of Astrological and Astronomical Terms

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

Copyright 2000-2019 OCA, Inc. All rights reserved. No portion of the dictionary may be reproduced in any form without written permission.

 

Average Daily Motion

The average motion of a planet during a 24-hour period. Traveling slower than average is a debility. The following list gives the Average Daily Motion of the seven visible planets from a geocentric point of view:

Moon          	13d 10m 36s 
Sun 0d 59m 08s
Mercury 0d 59m 08s (same as the Sun)
Venus 0d 59m 08s (same as the Sun)
Mars 0d 31m 27s
Jupiter 0d 4m 59s
Saturn 0d 2m 1s

Note that the Sun, Mercury, and Venus all have the same average daily motion from the viewpoint of geocentric astrology since they all travel together as a group (like a mini-solar system) around the Earth, which is the center of the geocentric universe.

There has been some confusion about these values because Mercury can travel as fast as 1 degree 40 minutes per day and as slow as 1 degree 6 minutes per day. Hence, the average (mean) value of Mercury's fastest and slowest speeds is 1 degree 23 minutes, which is faster than its average daily motion over the course of a century.

Similarly, Venus has a fastest speed of 1 degree 22 minutes per day and a slowest speed of 1 degree 2 minutes per day. Hence, the average (mean) of Venus' fastest and slowest speeds is 1 degree 12 minutes, which is faster than its average daily motion over the course of a century, since both Venus and Mercury travel as a group with the Sun around the Earth in geocentric astrology.

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