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Traditional Astrology For discussions on Traditional Astrology only. (Note: Typically, traditional astrology is defined as using techniques developed prior to 1700 by astrologers from the Hellenistic, Persian, Hebrew, and Renaissance eras. In general, it relies on Ptolemaic aspects (sextile, trine, square, opposition and conjunction) though there may be some exceptions, and always excludes modern planets (Neptune, Uranus and Pluto,) as well as any asteroids. The focus is less on what would be considered modern psychological chart interpretation and more on prediction. Members who wish to explore a combination of traditional and modern ideas should feel free to start a new thread in an appropriate forum for further discussion.)

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Unread 04-14-2019, 07:59 PM
petosiris petosiris is offline
Join Date: Oct 2017
Posts: 4,524
Planetary Phases from Ptolemy's Almagest

M - morning/eastern to Sun, first visibility with outers
E - evening/western to Sun, last visibility with outers

For a modern astronomer's way of computing arcus visionis, see

Our fellow astrologer Kolev, however, disagrees with Schoch -

It's a very tentative area and mostly overlooked by astronomers, since it takes into account many factors as well as the local atmosphere. I would, however, disagree with Kolev's method of taking atmosphere astrologically (but not astronomically), since we strive to observe not appearances and clouds, but the ambient. So, I would prefer to see a precise theoretical model built only on superior/inferior conj and latitude for an average quality atmosphere, but unfortunately there is not enough interest it seems and I don't have the necessary skill to do so myself.

Last edited by petosiris; 04-14-2019 at 09:07 PM.
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almagest, phases, planetary, ptolemy

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