# Category "Primary Direction Calculation" Page 1/1

Primary Direction Calculation Mark Rusborn

A complete guide for astrologers: calculating a primary direction in the Placidus house system with mathematical formulas.

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A complete guide for astrologers on how to calculate a primary direction in the Regiomontanus house system with math formulas.

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Antiscia is a point symmetrical to the planet's degree. But if the planet deviates from the ecliptic, it has two antisсia. Let's illustrate it.

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The main question in primary directions is which plane to use for aspects. It is not the equator or the ecliptic. Let's explore the right approach.

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Planets conjunct each other spatially when their mundane positions coincide. What is it, and how can it be calculated? Learn more from this article.

Read more →Primary Direction Calculation Mark Rusborn

What does the spatial connection of two planets look like in the Placidus house system? Get acquainted with the equations of mundane positions.

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