Meridian Primary Directions Truth Card

Historical Name

• Meridian
• sometimes described as directions according to the equator

Mathematical Basis

• equatorial primary-direction family
• the current admitted branch measures perfection by equatorial right-ascension difference
• on the current surface:
  • direct = (RA_significator - RA_promissor) mod 360
  • converse = (RA_promissor - RA_significator) mod 360

Interpretive Meaning

• perfection through an explicitly equatorial doctrine
• cleaner and more schematic than the semi-arc and under-the-pole families

Current Moira Admission

• admitted as a narrow explicit branch
• runtime-selectable on:
  • in_mundo
  • in_zodiaco
• active relation policy on the plain positional branches:
  • conjunction
  • opposition
• active relation policy on explicit aspect-point zodiacal branches:
  • conjunction
  • opposition
  • zodiacal_aspect
• the zodiacal branch uses the already declared zodiacal projection doctrine and then perfects by equatorial RA difference

Boundary

• this does not claim that every historical Meridian-family variation has been exhausted
• the current branch is the narrow explicit equatorial family only

Epistemic Status

• verified narrow admission