Cool Moon Facts by Whip

Real astronomy and dated history, with sources. Documented traditions and folklore. Modern lunar astrology · symbolic, not predictive.

Signs · Traditional technique · Advanced

Decan

Also called decanate

A 10° third of a sign; there are 36, each assigned a ruling planet.

The decans come from Egyptian star-clocks. In the Chaldean scheme the rulers run through the planets in order starting with Mars at 0° Aries; a modern scheme gives each decan to a sign of the same element instead. The site's Moon panel already names the Moon's decan.

Where sources differ
The Chaldean and triplicity-based decan rulers differ.
  • Kind: History, Technique
  • Tradition: Traditional Western astrology, Hellenistic astrology
  • In this site’s birth chart: not used

Related: Face, Chaldean order, Essential dignity

Written for Cool Moon Facts in its own words. An astrology source documents what astrologers believe or practise; it does not establish that astrology works.

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