One excellent way to better understand the nature of a Centaur is to study it in the charts of a number of people who share the same aspect. And the most intense expressions of these Centaur interactions come from the conjunction, the square and the opposition.
Take a look at these noted individuals with Pholus in aspect to a major planet, ASC, or MC, and see if you can see any patterns. All aspects are a maximum of 3 degree orb.
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