Birth-Time Rectification

Comparing uncertain birth times

Birth-time rectification compares candidate times when the recorded time is uncertain. A small change can move a cusp through a star or sub boundary, depending on the location and chart. It does not necessarily alter every cuspal sub-lord by the same amount.

The starting interval should reflect the available birth information. Documented milestones such as a marriage registration, job joining or relocation provide clearer comparison events than vague recollections of a difficult period.

Proposed rectification approaches

Ruling-planet methods compare proposed ascendant relationships with factors at a selected judgment moment. Event-based methods compare candidate charts with recorded events. Each approach has its own conditions; several candidates can remain plausible under the same set of examples.

Input sensitivity

If a cusp crosses a sub boundary within an uncertain ten-minute interval, representative times on either side can produce different interpretations. The changed coordinates and affected relationships are more informative than an unsupported assertion that one second is the true time.

Evaluation

The same criteria should be applied to every candidate. Events used to select a time should be distinguished from additional events used to evaluate it. Physical descriptions and retrospective matching do not establish a birth time as proven accurate to seconds.