import { Engine, Zodiac } from "./chart.js";
/** Traditional (domicile) ruler of each sign, Aries..Pisces. */
export declare const SIGN_RULERS: readonly ["mars", "venus", "mercury", "moon", "sun", "mercury", "venus", "mars", "jupiter", "saturn", "saturn", "jupiter"];
/** Traditional (domicile) ruler of a sign index (0 = Aries). */
export declare function signRuler(sign: number): string;
export interface ProfectedSign {
    sign: string;
    sign_index: number;
    /** 1-based whole-sign house from the natal Ascendant. */
    house: number;
    /** Traditional (domicile) lord of the profected sign. */
    lord: string;
}
/** The whole-sign profection `steps` signs after the Ascendant sign. */
export declare function profectedSign(ascSign: number, steps: number): ProfectedSign;
export interface Profection {
    age_years: number;
    /** 1-based month within the profection year. */
    month: number;
    annual: ProfectedSign;
    monthly: ProfectedSign;
}
/** Annual and monthly profection at `targetJd` for a natal Ascendant sign. */
export declare function profection(ascSign: number, natalJd: number, targetJd: number, yearLength?: number): Profection;
/** Profection from a natal chart: take the Ascendant sign from the natal chart,
 *  then profect to `targetJd`. */
export declare function profectionAt(engine: Engine, natalJd: number, targetJd: number, lat: number, lonEast: number, zodiac?: Zodiac, yearLength?: number): Profection;