Half points calculated from Aries zero degrees

[Vol2]

Small improvements.
I still had some time, that's all I can do for you, hope it helps.
Volker

[Jean]

Looks really nice Volker.

Not sure what to do, Ed says it's already in there..

[planatowski]

As far as I understand it now, it's about determining the nearest sun-half-sum to the axes in order to make a birth time correction with the half-sum - right?
Perhaps it would make more sense to ask Ed if he could include something like this in the cosmobiology module.
Or do you want to make your own module?
I haven't yet understood what exactly your intention is.
I would also need more information, e.g. which book the pages are from.
I have made a small module, maybe that will help you as a starting point. 
I don't want to invest any more time for now. Sorry.

The book is "Astrologische Kollektion zum Selbststudium" Karl Brandler-Pracht - "Die Hilfshoroskope" Band III

Case 1.)
There must be no bad aspect of Saturn or Mars to the Sun.
The next half-sum to one of the corner houses, House 1 or House 4 or House 7 or House 10 is sought.

Case 2.)
Saturn and Mars form a bad aspect to the Sun
.....

[Vol2]

Thanks for the information. I'll see if I can get the book.
I hope my efforts with the small module were helpful to you.
Wish everyone a sunny weekend.
Volker

[planatowski]

Unfortunately, Volume III is not available in the web archive, only Issue V "The Horary Astrology" is online.

https://ia600601.us.archive.org/6/items/astrolog00bran/astrolog00bran.pdf

Harald

[ABer]

Hi there. Is this a technique from Guido Bonatti. I'm a bit unclear on this from the thread. If so, does anyone know the original source in Bonatti. There is some similarity to the contra-antiscia, which are points reflected in the Aries-Libra axis. Ed

[planatowski]

https://www.astro.com/astrowiki/de/Antonio_Francesco_de_Bonattis

[Vol2]

So, I did some research.
The method for correcting the birth time by Francesco de Bonatti, as I understand it:
He assumes, that if the distance of the sun to a axis is the same as the distance of a planet to the same axis, that trigger the birth,
provided that the sun has no harmful aspect (all 45 degree angles) to Mars or Saturn.
In that case, conjunctions of the planets (or Antiscia) with a axis can trigger the birth.
But I'm not sure if he means the same distance between the sun/axis and planet/axis in longitude or as a semi-arc.
I suspect the latter.

[planatowski]

The method works differently, I will send you an English translation.

[Vol2]

Thanks for the offer, but I'm getting the book from Brandler-Pracht this week.
I got the information from a book by Walter Koch.
You can post the English translation in the forum or send it to Ed. 
Volker

Addendum 19-10-2024
I have now read the book and remembered where I have read about this type of birth correction before.
In R?diger Plantiko's book on primary directions, which is an excellent little book, unfortunately only available in German so far.
So I think bonatti means the same distance between the planets on the mc in right ascension and on the asc in oblique ascension in order to make corrections with primary directions.
Whether this is more accurate than carrying out the corrections on the ecliptic is a matter of belief.
Have a nice weekend.

[planatowski]

I hope the translation is understandable

[ABer]

Thanks for posting the information. I think the first part is relatively clear, although the method for calculating midpoints is bizarre. I get the same results using the more straightforward method (A + B) / 2 = mpt A/B. I can then follow finding the difference between the midpoint and the axes Asc/Des and MC/IC. However, I don't really follow how the writer concludes that the ascendant is not 19 Taurus but 9 Taurus. How is this worked out? It might be helpful to have the actual horoscope data that is used in this case study.

Ed

[Vol2]

Due to lack of time I can't continue with it for now, in case someone wants to use or modify the last version edited today.
Here it is. 

Addendum:
The values in the older books are often inaccurate (+- 30 arc minutes).
The reason for this is that back then they used ephemeris, logarithmic tables and house tables for their calculations.
Nevertheless, I am always very impressed by their ability.
Without PCs we would probably have 90% less astrologers

[ABer]

Hi there - thanks for posting the code. Unfortunately I don't have time to take this on either. Ed

[Vol2]

In the book the correction is realised in 4 steps.

1. Method Bonati, means semi-sum points to the axis.
2. Method Trutina hermetis, means with the conception chart.
3. Method Accidentia nati, means Direction of at least 3 events
4. Transits of events.

I have made the module only for corrections in longitude on the ecliptic.
Brandler makes the correction with rectascension and oblique ascension on the equartor. That's too time-consuming for me at the moment.
Whether this really produces more realistic corrections...Ed is the expert in classical astrology. I'm willing to be convinced.
Wishing you all a peaceful and stress-free Advent season.
Volker