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Transit Duration Analysis — Natal Chart

Find the longest continuous transit-to-natal aspect windows affecting one natal planet. This first iteration ranks duration only; it does not interpret an aspect as positive or negative and does not yet merge repeated retrograde passes into one extended episode.
Duration research
Slow planets are the most useful starting point for long-duration windows.
Iteration 1: by default all eight supported aspects are scanned: conjunction, semi-sextile, semi-square, sextile, square, trine, sesqui-quadrate and opposition. Every Enter → Leave window is measured independently and ranked by elapsed time. Retrograde motion is shown when it occurs inside a window, but separate passes are not yet grouped into a single multi-pass episode.