Decennials Doctrine

A timing technique that divides life into planetary rulership periods, with a reviewed Firmicus-style lane using ten-year-and-nine-month major periods.

Definition

Source-cited definition for this reference record.

Decennials are described as a chronocrator technique: a planet becomes ruler of a span of life and may then be subdivided into shorter planetary allotments.

The seed page names the reviewed Firmicus-style lane without treating every period-rulership tradition as the same method.

Definition sources

Demetra George. (2022). Ancient Astrology in Theory and Practice, Volume 2, Glossary definition cited in the decennials note.
Julius Firmicus Maternus. (1975). Julius Firmicus Maternus, Matheseos Libri VIII (Jean Rhys Bram, Trans.), Matheseos chronocrator procedure cited in the decennials note.

TopicTiming technique

TraditionsHellenistic, Late Antique, Medieval Arabic/Persian, Modern/Contemporary

AuthorsAbu Ma'shar, Chris Brennan, Demetra George, Julius Firmicus Maternus, Vettius Valens

Source texts5

Documented rules0

Method families1

Reference note

More source notes pending.

More reviewed source notes are still being prepared for this page.

Method coverage

Engine source-bundle coverage rows that support this reference page.

Timing calculation

Decennials

SupportedTiming Techniques5

Source notes

A timing technique that divides life into planetary rulership periods, with a reviewed Firmicus-style lane using ten-year-and-nine-month major periods.
Decennials are adjacent to firdaria and annual profections because all three organize a chart through time-lord or period-ruler language.
Future variant pages should cite their own starting rules, sequence rules, and subperiod tables.
The local notes use Firmicus as the primary procedural witness and Valens, Brennan, and Abu Ma'shar as adjacent context for period rulership language.
The page cites this as a lane-specific calculation, not a universal period formula.
The page does not publish planet-by-planet delineations or blend decennials with other timing techniques.
The page paraphrases source-note conclusions and uses source references instead of local extraction references.
The public page avoids equating Firmicus decennials with every chronocrator or period-lord method preserved in Hellenistic and medieval sources.
The reviewed lane begins from the sect light, assigns a major period of ten years and nine months, and uses a fixed planetary month table for subperiods.
This keeps the page from flattening different chronocrator families into a single calculation.
This page supports a reference explanation of the Firmicus-style decennial timeline and the source-backed distinction between major periods and subperiod allotments.
Those claims require separate reviewed interpretive facts or rules.

Doctrine sections

Each section groups reviewed rule notes by topic and lists the sources those notes draw on.

Section

Timing Technique

Reviewed source context for this timing technique. 5 listed sources.

Source texts

Abu Ma'shar. (2010). The Great Introduction to the Science of the Judgments of the Stars (Benjamin N. Dykes, Trans.).
Chris Brennan. (2017). Hellenistic Astrology: The Study of Fate and Fortune.
Demetra George. (2022). Ancient Astrology in Theory and Practice, Volume 2.
Julius Firmicus Maternus. (1975). Julius Firmicus Maternus, Matheseos Libri VIII (Jean Rhys Bram, Trans.).
Vettius Valens. (2010). Anthology (Mark T. Riley, Trans.).

5 locator entries

Abu Ma'shar. (2010). The Great Introduction to the Science of the Judgments of the Stars (Benjamin N. Dykes, Trans.).
Chris Brennan. (2017). Hellenistic Astrology: The Study of Fate and Fortune.
Demetra George. (2022). Ancient Astrology in Theory and Practice, Volume 2.
Julius Firmicus Maternus. (1975). Julius Firmicus Maternus, Matheseos Libri VIII (Jean Rhys Bram, Trans.).
Vettius Valens. (2010). Anthology (Mark T. Riley, Trans.).

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