Domal Analogue Function (for synastry)

[francoteves]

Hi friends. There is a very important function for synastry which is described in the screenshots from "Ronald Davison - Synastry, Understanding Human Relationships Through Astrology" that I have been looking for everywhere but no software has it, and the calculation seems very easy. I wish I knew the programming language to implement it. Doing it by eye is painstaking. Btw, is there a place where bugs/improvements can be sent?

Function: any planet in pro­ portionately the same house position as one in the partner’s horo­ scope could be in conjunction with it. In terms of house positions such a conjunction is a mundane conjunction. It follows that a planet on the cusp of the tenth house in one nativity will mundanely oppose a planet on the fourth cusp of another.

Formula: Charles Carter christened this derived position the “domal analogue” and the calculation is made thus: Number of degrees in the fourth house (7’ Aquarius to 13° Pisces)=36. Number of degrees in a sign=30. Distance of planet from fourth cusp=6’. 6x30/36=5. 4th house=4th sign=Cancer. The domal analogue of the planet is therefore 5’ Cancer.

I recently discovered PD and I am so impressed. I am a Solar Fire user but with the constant updates and feedback taken into account by the developers I am considering very strongly moving to PD.

Thank you.

[Jean]

Hi there,

So you want a list with each others 'domal analogues'?
File - Synastry - Domal Analogue Function?
I don't understand the example fully. Can you show an example with a chart so i can check the chart too.

[ABer]

Hi - thanks Jean - I don't fully understand the example either. It would be helpful to have some further information about this idea. I'm not entirely clear on the logic of proportionally dividing houses by longitude. There would be a clear logic in doing this with Placidus houses, but I am not sure about using it with any other system.

In my understanding, a planet that is (for example) one third of the way through a house in a chart using Placidus, could legitimately be mapped onto a planet in a second chart that is also one third of the way through the same house, irrespective of the longitude placement. This is because of the way that Placidus intermediate cusps are calculated. I don't see the similar logic for proportionally dividing the longitude value of the measurement from house cusp to house cusp.

Best wishes. Ed

[francoteves]

Thank you for replying friends. I'm sorry if I was not clear and thorough enough.
The calculation is useful for any house system to be able to see domal analogue aspects without eyeballing them from chart to chart. Of course it is much useful in Placidus where the houses are not proportional many times, but having a list, grid or even an aspect synastry grid between the two domal analogue positions would be incredibly useful. I know all this can be eyeballed but lots of time could be saved by having all the positions and aspects listed/grid ready to be consulted.

"So you want a list with each others 'domal analogues'? File - Synastry - Domal Analogue Function?" That would be very much desired. And also, if a synastry aspect grid could be added, that would save a lot of eyeballing.

Example:
Chart 1 has Moon and North Node at a specific poisition which seems to be in conjunction with the Moon's in Chart 2, but because of the difference in house size we cannot be absolutely sure about that; it could even be a conjunction with Chiron in Chart 2. This is where the domal analogue technique can make things precise and save lots of calculation/guessing. Using Carter's formula only with degrees we can see that the Moon in Chart 1 is at 21.17 "Virgo" (24° away from 6th cusp multiplied by 30 divided by 34 which is house 6 length) while the Moon in chart 2 is at 18.21 "Virgo" (17*30 / 28). So we can precisely conclude that both moons are in domal analogue conjunction by an orb of aprox. 3°.
Eyeballing conjunctions can be easy but other aspects after it can be more tricky and time consuming, like the Sun in Chart 1 being in opposition to Saturn and trine to Lilith in Chart 2.

I hope it is clearer now. Thank you for your disposition to make this incredible software even better.

[Jean]

Well, i'm gonna have a try.
Please provide me with a help file explaining a bit of the techique, not too much please.
It will go into file - synastry - various - Domal Analogue.
I created that 'various' submenu so it can be used for uncommon techniques.

[francoteves]

Wow!!! You are incredible. God bless your willingness and service. I will certainly do that. I will be posting it today.

[francoteves]

Is this help text clear and short enough?

Domal Analogue Technique

Technique christened by Charles Carter where planets in houses could be located at points in the zodiac equivalent to their house position. Thus a planet exactly on the Ascendant would be equivalent to a planet in 0° Aries, a planet on the second cusp to a planet in 0’ Taurus and so on... For planets located mid-way a house, the calculation is made thus with this example: Pluto is at 13° Aquarius in the fourth house. Number of degrees in the fourth house (7° Aquarius to 13° Pisces)=36. Number of degrees in a sign=30. Distance of planet from fourth cusp=6°. 6x30/36=5. 4th house=4th sign=Cancer. The domal analogue of Pluto is therefore 5° Cancer.

In synastry, any planet in proportionately the same house position as one in the partner’s horoscope could be in conjunction with it. In terms of house positions such a conjunction is a mundane conjunction. It follows that a planet on the cusp of the tenth house in one nativity will mundanely oppose a planet on the fourth cusp of another, and in the same manner any aspect can be seen between two domal analogues.

Source: Ronald Davison - Synastry, Understanding Human Relationships Through Astrology

[Jean]

Do an update and look at File - Synastry - Various - Domal Analogue
Asc / Mc are placed at 0 degree with this algorithm though.

[francoteves]

Jean, I am astonished at your genius and your willingness to take this software to the highest level. I will start recommending this software to all my friends and groups. Thank you very much and God bless your mind and soul.

[Jean]

Thank you   Forgot to say, if you want to look at code do application - edit and browse to ab\system\Synastry\Various\Domal Analogue.ab

[francoteves]

Thank you Jean. I tried to find information online to learn astrobasic (some years ago I used C++, so perhaps I could understand astrobasic and start contributing to PlanetDance) but I couldn't find any. Are there any resources you can recommend?

[ABer]

Hi there - there is a youtube video that I did which is an introduction to Astrobasic.

https://www.youtube.com/watch?v=5cl1-3dMEj8

Ed

[Jean]

Help - astrobasic has lots of info too. Note the section about the debugger, and use Context help (F11) on commands in a script.

[francoteves]

THank you very much dear friends. I will start studying all the available material.

[ABer]

There is also a board on this forum specifically for Astrobasic so you are welcome to ask questions there.

Ed