Equinox: now speeding it, and again retarding it
Definition
This historical phrase describes the true equinox moving alternately ahead of and behind its mean position. The effect is chiefly associated with nutation, a small periodic wobble in Earth’s rotational axis. It should not be confused with precession, the much slower long-term shift of the equinoctial points through the zodiac.
Astrological Meaning
In classical astrological practice, the phrase concerns astronomical measurement rather than a separate symbolic influence. Corrections involving the true equinox can affect apparent sidereal time and the precise celestial coordinates used to calculate angles and house cusps. Most contemporary chart software applies the relevant astronomical models automatically, so astrologers rarely calculate this variation by hand.
Why It Matters
Understanding the expression helps readers interpret older technical texts without mistaking it for a predictive rule. It also clarifies the distinction between the mean equinox, the true equinox, nutation, and precession. Although the difference is small, accurate reference points support reliable chart calculation, especially when reconstructing historical charts or comparing traditional tables with modern ephemerides.
Related Encyclopedia Entries
- Traditional Astrology
- Astrological Terminology
- Natal Chart
- Nutation
- Precession of the Equinoxes
- Sidereal Time
Continue Learning
Connect this Encyclopedia entry with our larger Astrology guides and in-depth interpretive libraries.
