Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    /**
     * Calculate the equation of center for the sun. This value is a correction
     * to add to the geometric mean longitude in order to get the "true" longitude
     * of the sun.
     *
     * @param  t number of Julian centuries since J2000.
     * @return Equation of center in degrees.
     */
    private static double sunEquationOfCenter(final double t) {
        final double m = Math.toRadians(sunGeometricMeanAnomaly(t));
        return Math.sin(1 * m) * (1.914602 - t * (0.004817 + 0.000014 * t))
                + Math.sin(2 * m) * (0.019993 - t * (0.000101)) + Math.sin(3 * m) * (0.000289);
    }

    /**
     * Calculate the Geometric Mean Anomaly of the Sun.
     *
     * @param  t number of Julian centuries since J2000.
     * @return Geometric Mean Anomaly of the Sun in degrees.
     */
    private static double sunGeometricMeanAnomaly(final double t) {
        return 357.52911 + t * (35999.05029 - 0.0001537 * t);
    }
}