Measure the smaller zodiac angle
Convert each planet to tropical longitude from 0° Aries. The separation between two bodies is the smaller arc around the circle, from 0° to 180°. If one body is at 359° and another at 1°, their separation is 2°, not 358°. For a target of 120°, a measured separation of 118.6° has a 1.4° deviation. An orb of 2° includes it; an orb of 1° does not.
Grand Trine: three trines
Longitudes at 0°, 120° and 240° make an exact example. The pattern often connects signs of one element, but this calculator checks the measured angles directly and does not impose a separate sign or element rule. If even one edge falls outside the selected orb, the triangle is not listed.
T-square: an opposition and two squares
Two planets form a 180° opposition, while a third forms a 90° square to both. At 0°, 90° and 180°, the planet at 90° is the focal point. The finder evaluates every possible focal planet among each three-body combination and reports the measured opposition and both squares. It does not add a fourth body at the empty arm or infer a Grand Cross.
Yod: a sextile and two quincunxes
A Yod has two planets separated by a 60° sextile and a focal planet approximately 150° from each. At 0°, 60° and 210°, the planet at 210° is the focal point, with two exact quincunxes. The site uses the same selected orb on the 60° and 150° edges, and prints all three deviations. Different traditions may use tighter or different orbs for quincunxes; keep this setting visible when comparing results.
What a missing birth time changes
The Moon changes longitude appreciably during a day. A shape involving it might appear at one hour but disappear at another. For date-only input, the tool checks seven local clock times, from midnight through 23:59, and lists a pattern only as a sampled possibility. A match at every sampled instant still does not prove it held continuously; a shape between samples can be missed. A recorded time is needed for a definite result under these rules.
Scope of the finder
The independent chart engine supplies apparent geocentric tropical positions for Sun through Pluto. No birthplace is needed for those longitudes, but the local date requires the historical UTC offset in effect at the time; daylight-saving changes within that date are not modeled by one fixed offset. This page reports geometry, not a psychological diagnosis or a prediction. Calculate a chart’s patterns.