Pars Fortuna in Astrology
In Astrology the term ‘Pars Fortuna’ represents a mathematical point in the zodiac derived by the longitudinal positions of the Sun, Moon and Ascendant (Rising sign) in the birth chart of an individual. It represents an especially beneficial point in the horoscopic chart. In Arabic Astrology, this point is called Arabian Parts.
The procedure followed for fixing one’s Pars Fortuna in ancient and traditional astrology depended on the time of birth, viz., during daylight or night time (whether the Sun was above or below the horizon). In modern western astrology the day time formula only was used for many years, but with more knowledge of ancient astrology, the two calculation methods are now often used.
The formula for calculating the day time Part of Fortune (PF) is (using the 360 degree positions for each point):
PF = Ascendant + Moon - Sun
The formula for the night-time Part of Fortune is PF = Ascendant + Sun - Moon
Each calculation method results in a different zodiac position for the Part of Fortune.
Al Biruni (973 – 1048), an 11th-century mathematician, astronomer and scholar, who was the greatest proponent of this system of prediction, listed a total of 97 Arabic Parts, which were widely used for astrological consultations. Paul Vachier has prepared an Arabic Parts Calculator for all the Arabic Parts.
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