I am fairly new to astrology and very new to Ernst’s work. I am nearly done with the Healing Rahu and Ketu course and am finding it invaluable.
My questions is about the way houses are being calculated. Most of the ways I had seen my chart in the past, my ketu was in the 5th house and rahu in the 11th. In Ernst’s software my ketu is in the 6th house and rahu in the 12th. Someone told me this is because he is calculating using the “whole house” method.
Can anyone point me towards somewhere this is talked about? Or why we can or should use this house calculation over others? It is obviously such an important piece to get right, and something I would like to understand.
I don't recall where this is explained exactly, you might try Jyotish building blocks or Horoscope. Also, the settings on your software maybe different from previous systems used.
Technically speaking, the house system that is used in most of Ernst work is the Campanus house system for specific cusps. The sign or the Rasi is the house, but one or more cusps may fall in that house. So Sign or Rasi, and the actual "Cusp" are two different things.
See attached image for clarification. In this chart Ketu, Ve, Me are in Aq the 4th house, but joined by the 3rd cusp. The Sun is in Pisces the 5th house but joined the 4th and 5th cusp. How this is generally interpreted is that there can be influences by both house indications.
I hope this helps. So many nuances that can seem complicated, and why astrology is a lifetime learning.
Please also keep in mind that there are 3 different ways of calculating Rahu/Ketu as well. they differ from several minutes to several degrees. So if Ra/Ke are close to your ascendant degrees, changing the method of calculation will easily change the house.
The recommended "interpolated true node" calculation method in Kala is not in any other software.
@blossomb If you have Kala you can just go with Ernst´s settings and take it from there.
here one gets a really deep dive into different house systems and their calculations: