Sun Sign Compatibility Calculator

Classical aspect
Semi-sextile
Zodiac Sign Compatibility Calculator
Canonical pair key
aries|taurus
Separation between the signs
30 degrees
Ptolemaic relationship
Disjunct - no Ptolemaic configuration
Element relationship
Fire and Earth are of opposite polarity
Modality relationship
Cardinal and Fixed - different modes of action
Shared polarity
Positive (diurnal) with Negative (nocturnal)
Signs apart
1
Method used
zodiac_sign_pair (sun-sign geometry only)
Compatibility narrative status
EDITORIAL_RUBRIC_REQUIRED
Interpretation status
EDITORIAL_RUBRIC_REQUIRED
Context
general
Worked out from Claudius Ptolemy, Tetrabiblos, Book I (translated F. E. Robbins, Loeb Classical Library 435) and 2 other sources.
No compatibility percentage is produced. A percentage would imply a measured success rate, and none exists.
Sun-sign geometry ignores birth time and place. Full synastry between two complete charts is a different calculation.
Sign compatibility is an entertainment convention with no demonstrated predictive validity. Nothing here should be used to make a decision about a relationship.

How this is worked out

4 steps
  1. Canonical pair key: Aries and Taurus sorted by zodiac order give "aries|taurus".
  2. Aries is sign 0 and Taurus is sign 1, so they are 1 sign apart = 30 degrees.
  3. 30 degrees is the Semi-sextile: Disjunct - no Ptolemaic configuration.
  4. Fire and Earth are of opposite polarity; modality Cardinal vs Fixed.

Results are general information, not financial, tax, legal, medical or engineering advice.