View attachment 115147
Hello David,
Here is the 'polarity-response' system that I use to explain the internal progress of the Ages. Missing are the halfway points that define each Age as having four parts. Prior to 69CE, the beginning of the latest Great Year, there's an impulse point at 473BC. The point beyond the start of Pisces is at 610AD. The position of all of these points in time is the windowresult of equal angle changes in the First Point of Aries.
My primary objection to your perihelion system is that it is based on a
metrical property of the solar system and not a
topological one. I could be mistaken, of course, but recognising the topological attributes of Astrology has been the key to my success in understanding this ancient art.
Henry.
Three types of years, sidereal, tropical, and anomalous. An astrologically constructed Age-window of 30 degrees is situated appropriately on an astronomically located, measured point.
For the tropical Ages, there's a True-setting each year, and the True-settings Oscillate back and forth. The Mean-setting is steadily Direct, at rate of 1.1 minute of arc each seasonal year, and my calculations have the Mean-setting ingressing tropical Aquarius in 2149 AD, for the Effective start of the new Age.
The current tropical Age is 1743 seasonal years, and the current Age began in 405 A.D. By coincidence, according to Historians, this was the very beginning of the Fall of the Roman Empire.
For a sidereal zodiac, the point most used is the Vernal Point, aka the First Point of tropical Aries, a boundary point between Earth's seasons. I'm locating the leading boundary of the sidereal Age-window there. This links the Past Age with the Age-in-Progress, as a background Age, and its Domicile-ruler as the Background Age-ruler. So, for example, the sidereal Age of Pisces shares the Age-window with sidereal Aries.
For the tropical zodiac, it's the shorter anomalous year versus the longer seasonal year which causes Precession of the Perihelion through the tropical zodiac. The Point of Perihelion is on the center-line of Earth's elliptical orbit. When a constructed Age-window is CENTERED on the Point of Perihelion, with its leading point as the Age-marker for each new Age, we now have a Forefront Age-in-Progress of tropical Capricorn, with a Background Age of Sagittarius.
How does using the Center-line of Earth's elliptical orbit to center the 30° Age-window, with its leading-point Age-marker 15 degrees in advance of the Point of Perihelion, relate to the "topological attributes" of astrology you're talking about? The results for the previous Age are remarkably similar to your GC located sidereal zodiac, regarding c.500 B.C. I'm using 3-Decants per age, as Age-divisions.
Btw, these tropical Ages aren't a replacement for the sidereal Ages, they're partnered with them. Both are about Earth-Sun relations - axial tilt for sidereal, and closest approach for tropical. Coincidentally, each has its own Age of Aquarius coming up next.