Hour c

Definition

Hour c is a historical or abbreviated astronomical notation rather than a widely standardized astrological term. In many technical contexts, “c” may indicate a circle, making the expression a possible shorthand for hour circle: an imaginary great circle passing through a celestial body and the north and south celestial poles. Its exact meaning should always be checked against the notation used in the original table, chart, or text.

Astrological Meaning

When Hour c refers to an hour circle, it belongs to the celestial coordinate framework used to locate planets and other points in the sky. An hour circle helps define hour angle and right ascension, measurements connected with a body’s position relative to the local meridian and celestial equator. Traditional astrologers and chart calculators use such astronomical relationships when determining angles, house cusps, rising times, and planetary positions. Hour c is therefore not normally interpreted as a planet, sign, house, or aspect in its own right.

Why It Matters

Understanding this notation can prevent technical chart data from being mistaken for a symbolic placement. If Hour c appears in an older ephemeris or astrological manual, identifying the author’s abbreviations is essential before using the value. Its importance lies mainly in accurate chart calculation and in reading historical astrological sources with appropriate astronomical context.

Related Encyclopedia Entries

• Traditional Astrology
• Astrological Terminology
• Natal Chart
• Hour Circle
• Hour Angle
• Right Ascension