On Apr 7 Ray wrote:
> In these surveys I'm not suggesting that the Placidus house system is
> any better than any other house system.
Hi Ray! Placidus may not be the best for astrological interpretation
(I don't use it myself) but I think it is the system that gives any
planet an equal chance of being in any house for a sidereal time
picked at random. At least I think that's the conclusion the
Gauquelins arrived at in their 1957 paper on diurnal distributions of
planets; I'll have to re-read it when I have a moment of serenity.
If you want to continue with Placidus (whether the above paragraph is
true or not) it would be preferable to use three-dimensional Placidian
sectors and take a planet's latitude into account. This is better than
what the Gauquelins did, because with the tools available in the 1950s
they chose to assume planets were on the ecliptic. I don't know what
people have done in more recent studies - presumably they have used
the better method.
I'll give the formulae in a separate thread. Not only are they easier
than those for determining house cusps, but they can easily be adapted
to any number of sectors you desire: the Gauquelins used 18 and
sometimes 36.
Axel