Part of Fortune Type

The way in which the Part of Fortune, as displayed in charts, is calculated may be selected by the user. In the "Preferences" dialog, "Calculations" tab the following options are available...

Different Day/Night - According to researchers of ancient astrological texts, the correct method of calculating the Part of Fortune is to use ASC+Moon-Sun for daytime charts, and ASC+Sun-Moon for nighttime charts.

Fixed Formula – (Daytime Only) Many astrological programs in the past (including earlier versions of Solar Fire) have used a calculation for the Part of Fortune which is based on a single formula for both day and night charts i.e. ASC+Moon-Sun. Although this is now thought to be incorrect, many astrologers have become accustomed to using it in this way, so this option is included for their convenience.

Any charts subsequently opened or calculated will use the newly selected calculation type.

Note that this option affects the position of the Part of Fortune as shown in charts and all reports with the exception of the Arabic Parts report of Solar Fire. If you wish to alter the calculation of the Part of Fortune in the Arabic Parts report, then you must use the Arabic Parts Editor.