Significator and promissor

Meaning

Every primary direction pairs two points on the celestial sphere:

1. The Significator (Greek aphetēs, "releaser"; Arabic haylāj / hyleg; Latin significator or prorogator): the natal chart point whose life-domain is being timed. It acts as the seat of reception—the enduring bodily, social, emotional, or material principle in the native's life.
2. The Promissor (Latin promissor or promittor, "that which promises"): the planet, aspect ray, antiscion, fixed star, or term boundary whose arrival at the significator's mundane seat fulfills its promise in time.

As William Lilly summarizes in Christian Astrology (1647): "The Significator is no other thing than that Planet or part of Heaven which signifies the thing whereof we would know the time of its acting; the Promittor is that Planet or degree of Heaven which by moving onto the Significator, performeth what is promised" [3].

The Five Classical Significators

Following Ptolemy (Tetrabiblos III.10) [1] and Morin (Astrologia Gallica XXII) [4], five principal significators govern distinct spheres of the nativity:

Types of Promissors

While significators are restricted to the vital centers of the chart, almost any active celestial agency can serve as a promissor:

• Bodily Conjunction & Opposition (Conjunction / Opposition): The planet itself (with or without its ecliptic latitude β, depending on the school) or its diametrically opposite point.
• Dexter and Sinister Aspects (Sextile, Square, Trine): Measured either along the ecliptic (in zodiaco) or proportionally across the diurnal and nocturnal semi-arcs (in mundo). A dexter aspect precedes the promissor in zodiacal order; a sinister aspect follows it.
• Mundane & Rapt Parallels: Two bodies brought into equal proportional semi-arc distance from the meridian, either by natal configuration or by the diurnal carrying of the Primum Mobile (see rapt parallel).
• Antiscia and Contra-Antiscia: Solstitial mirror points of equal or opposite declination (see antiscion and contra-antiscion).
• Royal & First-Magnitude Fixed Stars: Directed strictly in mundo with their true full 3D right ascension and declination (Regulus, Spica, Aldebaran, Antares, Fomalhaut, Sirius).
• Term Bounds (Bounds): The zodiacal degree boundaries of the five planetary terms, which divide the significator's walk into multi-year chapters governed by a Distributor (Divisor) (see circumambulation).