import type { EquatorialCoordinate } from "../types.js";
import { type Matrix3 } from "./vectors.js";
export interface NutationAngles {
    readonly longitudeDegrees: number;
    readonly obliquityDegrees: number;
    readonly meanObliquityDegrees: number;
    readonly trueObliquityDegrees: number;
}
export declare function nutationAngles(julianCenturyTt: number): NutationAngles;
export declare function nutationMatrix(julianCenturyTt: number): Matrix3;
export declare function applyNutation(coordinate: EquatorialCoordinate, julianCenturyTt: number): EquatorialCoordinate;
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