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

Chart basics · Intermediate

Minute of arc

Also called arcminute, ′

One sixtieth of a degree, written with a prime: 12°34′.

Minutes are the usual finest division in a chart. The full Moon is about 31 minutes of arc across, and the Moon moves roughly half a minute of arc every minute of time, which is why an exact birth time matters for its degree.

Kind: Calculation
Tradition: Shared across Western traditions
In this site’s birth chart: used

Swiss Ephemeris documentation (Astrodienst): house systems, nodes and calculation conventions (opens in a new tab) technical

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.

All terms · Your birth chart

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Minute of arc

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Minute of arc

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