An illustrated guide to Morinus directions

Morinus is one of my favorite astro-software. Anyway the pd-in-charts settings potentially very useful because beyond showing the primary chart for the aspect’s perfection, they allow to calculate the directions for a given moment, are very poorly implemented, being totally unconnected from the primary directions settings.

Many times I told about this mistake, and the same did some primary directions experts, but we were totally unheard. Why someone should set again the chart in pd-in-chart when s/he already set them in primary directions menu? It’s a mystery to me, the only result  is a very high chance of getting the wrong result. So I hope this short guide will be useful.

Primary directions settings in Morinus are under the OPTIONS MENU.

newmoonThe first thing to do is choosing a directions key under PRIMARY KEYS  (traditionally these are PTOLEMY for semiarc, NAIBOD for Regiomontanus, TRUE EQUATORIAL SOLAR ARC for Placidian underthepole &   mundane.

newmoonLet’s start from semi-arc directions.  After having chosen the Ptolemy key in the primary key dialog, we will arrange primary directions settings like that:

newmoonBefore casting the directed chart we should set the PD-in-chart dialog with ecliptic-feet option:

newmoonnow we can cast the chart from the TABLES MENU/PRIMARY DIRECTIONS

newmoonIf we want to use under-the-pole directions the following settings are needed ((don’t forget to set the true equatorial solar key in key settings:

newmoonin the same way Regiomontanus should be set like this (Naibod key)

newmoonpd in chart should be zodiacal-from the planets

newmoonand then

newmoonwe will do the same for mundane ones

newmoonand then in pd-in-charts, terrestrial option

newmoonand eventually

newmoonwhatever kind of directions, we can search a direction by the event date from the primary chart tables, clicking and choosing the needed date (or arc of direction)

newmoonEnjoy and good work!

Written by Margherita Fiorello, CIDA certified member, for heaven astrolabe blog @ year 2012. If you want to be notified the next time I write something, subscribe to my RSS feed.


4 thoughts on “An illustrated guide to Morinus directions

  1. Dear Margherita,
    thank you for this post. It is very informative.
    But – what is the reason for using PD Placidus (semiarc) or Placidus under the pole or Regiomontanus. Is any kind better than other or they are used for different purposes?
    Best wishes,

  2. I believe every author has is favorite method, that’s all. Moreover both Regiomontanus and Placidus argued that they were using Ptolemy’s method, which obviously was not, because Ptolemy’s method is the semiarc.

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