Skyscript Astrology Forum

Domingo,

Thank you for the links. I will have a look.

Problem programs couting some variant of primary direction(PD)is,that the often isn?t in instructions exactly described by that walks and alone author programme hasn?t this question unequivocal.Result is that the many programs calculate PD with errors or directly wrong.Summary of types PD be at Rumen Kolev on:

www.babylonianastrology.com

There are a number of programs that the calculate one or more variations of PD.
What are the possibilities SolarFire.Here? definition adequate.Can correctly calculate mundo Placidian PD with 3 key(1Year per Degree,Naibod,Natal Solar Rate) and PD Wim van Dam described on :

www.astrosoftware.com/WimVanDamArticles.htm

SolarFire to calculation direction and progression uses algorithms Alan Leo.This us will enable use hidden possibility,which revealed my fellow,calculate zodiacal PD axis(only axis!)without latitude.

Progress setting:
Preferences-Edit settings-Progs/Dirns-Chart Angle Progression-Naibod in RA
Rate for User Progre-1
Progression Day Type -Standard(Q2)

Calculation setting:
Wiew Chart-Transits-Event selection-Progs to Radix
Dynamic Type-Progressions-Secondary
Point Selection-Progs:Planets-Edit:AS,MC-Save-Select
Radix:select planets
Aspect: select aspect
Select period of report and Save Selection(for example-Zodiacal PD)
Select:Parallels of Decl.(in Event Selection),will enable calculate also declination parallels.

Warning,calculated values of course are in Naibod rate.

Hi Martin,

I also have an astrology software(free, Linux, Windows, MacOS), it's called Morinus:
http://pymorinus.extra.hu/

It knows Placidian(semiarc) and Regiomontan Primary Directions.

Best regards,
Robert

Thanks, Rob; I'll definitely look into it. I have been busy on other things recently, but plan to get back to the question of PD software soon. (Petr: I haven't forgotten!)

Martin Gansten wrote:Also, if anyone knows of other primary direction software than the above-mentioned, please let me know.

Urania also has wide selection of primary progressions:
Ecliptic (for Asc and MC), Hour Angle (first equatorial coords), Campanus, Regiomontanus, Placidus, Topocentric, Porphyry, Horizon, Krusinski, Koch, etc.

I call them primary progressions (not primary mundane directions) since they go basic route "as on heaven so on earth". The algorithms amployed by Leo and since then ignore own planetary movements. In these sources, as the way to quicken primary directions' computations (which could take days or weeks for Regiomontanus/Campanus, and other systems), the Placidus was used (as the only system where primary directions for the whole life can be quite precisely calculated with only one chart in few hours by hand). Out of this the 1/4 degree for 90 years for sun, or 3 degerees for 90 years for moon, were ignored. Nowadays, with the advent of computers, where calculating the whole primary progressed chart takes tiny fraction of second (less than 0,0001 sec), such approximate algorthims are no longer necessary, so I went exact route. The basic key is 1 divided by "365,2422 * 365,2422" (naibod key = 0 deg 58 ' per year). This is the same route that is also employed by SwissEphemeris' test module Ceres by Dieter Koch ( http://www.astro.com/swisseph ).

The trial version (and freeware lite) can be downloaded from:

http://www.astrologia.pl/urania-en.html