primary_directions_truth_card_regiomontanus - TheDaniel166/moira GitHub Wiki

Primary Directions Truth Card: Regiomontanus

Status

  • doctrinal family: historically attested
  • Moira status: admitted on a narrow explicit surface
  • role in Moira: major second branch after the Placidian family

Identity

Regiomontanian primary directions are not a cosmetic alternative to Placidian directions. They are a distinct geometric family centered on house circles and under-the-pole logic.

Mathematical Basis

Direction Space

  • historically used in both mundane and zodiacal applications
  • especially important in under-the-pole constructions

Geometric Basis

  • house circles are central
  • the significator's circle or related under-the-pole chart construction becomes the decisive geometric framework
  • pole and derived RAMC quantities are essential in the mature algorithmic form

Motion Basis

  • direct and converse motion are both relevant
  • the core issue is not whether the sphere reverses, but how the perfected relation is defined under the given doctrine

Key Basis

  • static keys are traditional
  • modern software often layers multiple keys over the same geometry

Latitude Basis

  • latitude and pole treatment are structurally important
  • this family cannot be reduced to longitude-only logic without ceasing to be itself

Interpretive Meaning

Regiomontanus treats the event as the perfection of a relation defined by a Regiomontanian world-frame, not by Placidian proportional ascension.

Interpretively, the claim is still primary-directional:

  • primary motion times life
  • promissor indicates active event quality
  • significator indicates area of life

But the geometry implies a different doctrine of how that perfection is reached.

Historical Standing

  • strongly attested
  • central in Renaissance and later discussions
  • explicitly documented in relation to William Lilly and later research by Rumen Kolev

This is one of the few families that clearly deserves separate treatment at the same doctrinal rank as Placidian methods.

Distinguishing Features

Regiomontanus differs from Placidian families by:

  • relying on house-circle and under-the-pole constructions
  • using distinct pole and RAMC derivations
  • changing the geometric meaning of perfection, not merely the display system

It differs from zodiacal-only directions by:

  • remaining fundamentally sphere-constructive even when zodiacal points are admitted

Main Ambiguities

1. Historical Scope

Historically native in this family:

  • planet-to-angle and related core directions

Less settled:

  • full aspectual systems
  • modern software expansions beyond attested practice

2. Zodiacal with Latitude

Kolev's discussion makes clear that some Regiomontanian practice includes zodiacal aspects with latitude, which moves toward what later software may call field-plane families.

3. Modern Expansion

Modern authors and software sometimes generalize Regiomontanian primaries into a very broad research space not identical to documented historical practice.

Moira Admission Policy

Moira should admit Regiomontanus as:

  • a separate geometry family
  • a separate validation branch
  • not merely a flag on top of the Placidian engine

Current Moira boundary:

  • Regiomontanus is admitted as an explicit under-the-pole branch
  • the current narrow runtime uses oblique-ascension difference under the significator's pole
  • it is admitted on the currently explicit in_mundo and in_zodiaco surfaces
  • active relation policy on the plain positional branches:
    • conjunction
    • opposition
  • active relation policy on explicit zodiacal aspect-point branches:
    • conjunction
    • opposition
    • zodiacal_aspect
  • broader historical scope, wider target doctrine, and fuller latitude-bearing zodiacal/field-plane expansions remain deferred

Implementation Consequences

Before implementation, Moira should specify:

  • whether the first Regiomontanus admission is mundane-only or also zodiacal
  • the exact under-the-pole construction policy
  • admissible promissors and significators
  • whether latitude-bearing aspectual forms are included or deferred

Research Sources

  • Rumen Kolev, William Lilly and the Algorithm for His Primary Directions: https://www.babylonianastrology.com/downloads/Lilly2.pdf
  • Mastro manual: https://mastroapp.com/files/documentation_en.pdf
  • Halloran primary-directions material: https://www.halloran.com/placidus.htm
  • AstroWiki, Primary Direction: https://www.astro.com/astrowiki/en/Primary_Direction