Loading…

Bringing this part of Stelliums into view.

Whole Sign Houses and the Midheaven | Stelliums Research

Research

Whole Sign Houses and Exact Angles Are Different Layers

Why Stelliums uses Whole Sign Houses for topical places while still preserving the exact Ascendant and Midheaven.

Published 8/21/2026 · Updated 8/21/2026

Using Whole Sign Houses does not require discarding exact astronomical angles. In Stelliums, the zodiacal sign containing the Ascendant establishes the first Whole Sign house, while the exact Ascendant longitude remains a calculated angle. The exact Midheaven is also preserved even when it falls outside the tenth Whole Sign house.

Topical structure versus exact degree

The Whole Sign house sequence answers which zodiacal sign constitutes each topical place. The exact Ascendant and Midheaven answer different astronomical questions. Treating these as separate layers prevents the house system from erasing angle data.

Why this matters in software

A chart database should preserve the underlying longitudes even when the user interface emphasizes Whole Sign houses. This allows future governed techniques to use exact angles without forcing a migration away from the Hellenistic house framework.

Stelliums stores both the topical Whole Sign structure and exact angle longitudes rather than treating them as competing data models.

Sources

Firmicus Maternus, Mathesis

Firmicus Maternus · Mathesis · Ascendants and topical places

Open source

Vettius Valens, Anthologies

Vettius Valens · Anthologies · Places and angular structure

Open source

Method note

Stelliums separates cited historical or scholarly material, computational rules, and interpretation. A published article does not silently change calculation logic; engine and rules changes remain independently versioned.