Synastry Basics in Midpoint Astrology

Before setting up a synastry chart, it's a good idea to review some basic work about the 90-degree circle. For a complete description, please refer to the foundation text, Midpoint Interpretation Simplified.


Starting with the chart that you want to analyze, set up three groups entitled: Cardinal, Fixed, and Mutable. Copy from your standard 360-degree circle (traditional horoscope) all your stellar bodies into the proper group. The Cardinal group includes all placements in Aries, Cancer, Libra, and Capricorn. The Fixed Group includes all placements in Taurus, Leo, Scorpio, and Aquarius. The Mutable group includes all placements in Gemini, Virgo, Sagittarius, and Pisces.


On the cosmogram mark the ends of each section. Next, transfer all of the 13 stellar bodies to the 90-degree circle. Begin with 0-30 degrees of the Cardinal section. Continue counter-clockwise until you have finished the entire 90-degree circle. When you are finished you will have completed your Cardinal, Fixed, and Mutable sections. Do the same with each birth chart, entering the stellar bodies from one complete birth chart into one circle, either the larger circle or the smaller circle.


Now you are ready for your first synastry case study. Look for these key contacts: 1. Find all contacts made by conjunction


Midpoint Conjunction
Synastry Conjunction
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2. Find all contacts made by opposition

Midpoint Opposition
Midpoint Opposition
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3. Find all contacts which midpoint two planets


Midpoint Opposition between Planets
Midpoint Synastry Opposition Contacts
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It does not matter which circle you choose to enter in each chart. However, if you decide to enter your stellar bodies in the smaller circle and another's stellar bodies in the larger circle for comparison, always enter these two circles the same way.


A good rule is to keep your chart as the smaller circle and the other person's you are comparing will be the larger circle There are software programs that help simplify entering the planets on a synastry chart but they are expensive and have dozens of options and configurations. This understanding of synastry basics will allow you to choose the right program. When setting up software use an ecliptic coordinate system, an H4 wheel style, and a modulus of 90 degrees to get the traditional 90 degree wheel - some programs have this built in as a choice.


Note the orb between the two contacts In the beginning of your synastry study allow a three degree orb that is 1 1/2 degrees on either side of the contact you are interpreting.


In many cases influence will be felt with a much wider orb; but when you are comparing complete strangers you must use a standard three degree orb for proficiency. If you know the two charts intimately you are in a better position to allow larger orbs on occasion.

Midpoint Interpretation Simplified