Decans and Faces
Three ten-degree sectors and declared face-ruler sequences. This guide gives a reproducible rule, worked example, illustrative near miss, and explicit limits.
Overview
Decans divide each sign into three ten-degree sectors, while face rulers depend on a stated Chaldean or alternative scheme and should not be confused with modern sign decan narratives. The page separates calculation from interpretation and keeps this worked result conditional: the placement is in Leo’s third face, assigned to Mars in the declared sequence. Verification follows this declared method: Map 0°–9°59′, 10°–19°59′, or 20°–29°59′ using full precision, then show the selected sequence and ruler.
At a glance
- Topic
- Decans and Faces
- Method family
- Decans and Faces · traditional and specialist methods
- Case inputs
- 23°♌; Chaldean face sequence declared; zero-based degree interval 20°–30°
- Measured finding
- the placement is in Leo’s third face, assigned to Mars in the declared sequence
- School frame
- Decans and Faces · traditional procedural method
- OpenFate tools
- Decans and Faces · knowledge reference only
Definition and exact scope
decans divide each sign into three ten-degree sectors, while face rulers depend on a stated Chaldean or alternative scheme and should not be confused with modern sign decan narratives
Calculation or decision rule
map 0°–9°59′, 10°–19°59′, or 20°–29°59′ using full precision, then show the selected sequence and ruler
Worked case and illustrative near miss
23°♌; Chaldean face sequence declared; zero-based degree interval 20°–30°. the placement is in Leo’s third face, assigned to Mars in the declared sequence.
Illustrative near miss: Calling 23° Leo the second face by counting sign sections from 1° rather than the 0° boundary.
School and variant boundary
Tables and procedures differ by author, era, translation, and sect; the selected authority must remain visible.
Product, safety, and verification boundary
OpenFate presents Decans and Faces as a sourced knowledge method and does not claim a dedicated calculator or generated reading for it. Verification retains failed measurements and uncertainty, then revises interpretation rather than the receipt. Decans and Faces cannot diagnose a person, remove consent, or guarantee an event.
Sources and editorial basis
- NCGR-PAA Level II CurriculumPDF pp. 4–5, lines 104–119, “Classical Astrology — Beyond the Basics”.A professional curriculum naming sign classifications, five levels of rulership, reception, dispositors, sect, minor aspects, declination, antiscia, fixed stars, lots, and time-lord systems.
- William Lilly: Christian Astrology, Books I and IIBook I, dignity tables pp. 104–105 and p. 112 definition; face/decan rulership.A public scan of a seventeenth-century primary text used to verify Lilly-era terminology, tables, and worked rules without presenting that historical system as universal.