Rectification

rek-tih-fih-KAY-shuhn

Definition

Rectification is how astrologers work out an unknown or uncertain birth time by reasoning backward from precisely dated life events. You propose a candidate birth time, build the chart, and check which timing techniques — transits, secondary progressions, solar-arc directions, primary directions — would have reached the chart’s angles and sensitive points on the dates of known events, then nudge the time until those matches are as strong as possible. Because the angles move about 1° every 4 minutes of clock time, even a small error shows up as a mismatch with events tied to the angles.

In Tradition

In modern Western practice, rectification works like a test: the candidate birth time is the unknown, the dated life events are the data, and the contacts made by the timing techniques are what gets checked against it. Marriages tend to line up with the 7th house, career milestones with the 10th, events involving parents with the 4th and 10th, and house moves with the 4th — the angles the most time-sensitive test points. The same process settles between rival national founding charts in mundane astrology.

In Practice

The astrologer first gathers a body of major life events, dated to the day wherever possible: marriages, the deaths of close relatives, the births of children, career milestones, house moves. They then propose a candidate birth time, build the chart, and work out the dates on which solar arcs and progressions would have reached the angles and the birth planets, along with the major transits to the angles. The proposed time is adjusted step by step until those projected dates line up with the real event dates. Several techniques — transits, progressions, solar arcs, primary directions, profections — are cross-checked against each other. Confidence grows when more than one technique agrees on the same time, and when events tied to the angles — a marriage, a public role, a home move — show clean contacts to the rectified angles.

Historical Origin

Rectification by event-correlation is a standard medieval and Renaissance technique — Lilly’s Christian Astrology (1647) sets out ways of checking or correcting a birth time through the Trutine of Hermes (the position of the Moon before birth) and through events of the body and the life. The modern systematic literature took shape in the 20th century: Marc Edmund Jones, Reinhold Ebertin (Cosmobiology and the 90° dial), Noel Tyl (Solar Arcs), and Marion D. March and Joan McEvers gave detailed procedures still in use today.

Further Reading