Primary (PD) or secondary (SD) directions
To calculate the primary directions for a chart, you need to:
- Open a chart map file.
- Choose the start age and end age of the primary directions.
Only directions that are between these two ages will be shown, excluding the starting age and including the ending age.
- Choose the planets you want to study. By default, all planets are
chosen.
- Select aspects to consider.
You must click on each desired aspect in the list.
- Specify if directions should be calculated with or without latitude.
By default, the box is checked, so that the calculation is done with latitude.
- If necessary, indicate the sorting method for the directions.
If the box is checked, the directions are displayed by age. Otherwise, directions are displayed in zodiac order.
- Indicate the method of calculation of the primary directions, Placidus or Campanus
For secondary directions you must additionally specify:
- Step (in days):
Proastro increments the natal chart by this number of days to calculate
the progressed chart and compares it with the initial natal chart which remained fixed.
- The orb in degrees:
To find the aspects between the progressed chart and the fixed natal chart, we use
this orb.
Notes:
- For PDs, Campanus and Regiomontanus give the same results; this is the method used by Henri Gouchon
- The method to take in account the latitude are multiple; the method used here is
to choose a point of the zodiac (latitude is 0) which is at the desired angular distance (0,60,90,120,180 etc.)
of the planet.
For the theme of Raymond Poincaré, given as an example in the "Les directions primaires simplifiées" from Henri J. Gouchon (in french),
the results obtained are very similar (less than one year difference).
- For SD, it is possible to find for one or two successive years the same direction.
It depends on the chosen orb and the speed of each planet.
- For SD, you can lose aspects;
for example for the Moon, if you choose a step of 1 day and an orb of 1°,
the angular velocity of the moon being about 13° per day, you can skip an aspect; for exemple in the illustration below, the opposition to Mercury is skipped .
☽ | ☍ ☿ | ☽
|
<----------- 13° ---------> |
<-1° | | 1°-> |
J | | J+1 |
- For the SD, the filters on the planets make it possible to ignore slow (heavy) planets;
The aspects they make with heavy natal planets are virtually identical for all life, and therefore
aspects are repeated every year.
To avoid this problem, it is advisable to remove them from the filter.
These are Jupiter, Saturn, Uranus, Neptune, Pluto.
You can use the button "Default lists" to have the recommended filter.
See also:
Primary Directions