T-Square Astrology
T-Square Astrology explains one opposition, two squares, the apex, modality and orb rules, a worked example, and clear limits.
Overview
A T-square requires an opposition whose two ends both square a third focal planet, forming three linked aspects rather than a visual resemblance. The page separates calculation from interpretation and keeps this worked result conditional: ☉–☽ opposition 1°; ♂ squares each end by 2° and 1°; Mars is the apex. A T-square is a three-factor pattern with one opposition and two squares meeting at an apex or focal factor. Cardinal, fixed, and mutable versions use their corresponding signs, while an out-of-sign pattern requires explicit degree and orb evidence. Angles, nodes, Chiron, and the open leg count only under the declared modern rule; the pattern is not a curse or achievement score. Verification follows this declared method: Verify A–B near 180°, A–C near 90°, and B–C near 90°, then name the focal planet and the unoccupied opposing degree without inventing a missing planet.
At a glance
- Topic
- T-Square
- Method family
- T-Square · aspects and configurations
- Case inputs
- ☉ 2°♈, ☽ 3°♎, ♂ 4°♋; all major-aspect caps set to 6°
- Measured finding
- ☉–☽ opposition 1°; ♂ squares each end by 2° and 1°; Mars is the apex
- School frame
- T-Square · multi-factor pattern test
- OpenFate tools
- T-Square · birth chart + astrology reading
Definition and exact scope
a T-square requires an opposition whose two ends both square a third focal planet, forming three linked aspects rather than a visual resemblance
Calculation or decision rule
verify A–B near 180°, A–C near 90°, and B–C near 90°, then name the focal planet and the unoccupied opposing degree without inventing a missing planet. Calculate all three pairwise separations. Require one link near 180 degrees and two near 90 degrees under one published orb, then name the apex and exact deviations. State which bodies or angles can participate and whether out-of-sign patterns count. Do not infer trauma, illness, success, or a missing personality from the geometry.
Worked case and illustrative near miss
☉ 2°♈, ☽ 3°♎, ♂ 4°♋; all major-aspect caps set to 6°. ☉–☽ opposition 1°; ♂ squares each end by 2° and 1°; Mars is the apex.
Illustrative near miss: One opposition plus only one passing square is an open triangle, not a T-square.
School and variant boundary
A pattern exists only when every required geometric edge passes the same published inclusion rule.
Product, safety, and verification boundary
OpenFate can connect T-Square to the natal chart and reading flow where supported; the connection supplies evidence, not a guaranteed life result. Verification retains failed measurements and uncertainty, then revises interpretation rather than the receipt. T-Square cannot diagnose a person, remove consent, or guarantee an event.
Sources and editorial basis
- Skyscript: An Introduction to Aspects and Chart ShapingSection “Aspect Patterns”; examples and diagrams for multi-planet configurations.Nicholas Campion’s public overview of major and minor aspects, orbs, and multi-planet chart patterns; its interpretations remain school-bound claims.
- Faculty of Astrological Studies: Foundation CourseModule 2, “Aspects and aspect patterns”; multi-planet patterns within whole-chart interpretation.A public practitioner curriculum that explicitly scopes polarities, elements, modes, aspects, patterns, and synthesis; it documents a teaching tradition, not scientific validation.