92 lines
2.5 KiB
Java
92 lines
2.5 KiB
Java
|
/*
|
||
|
|
File: AstronomicalConstants.java
|
||
|
|
|
||
|
|
University of Applied Science Berne,HTA-Biel/Bienne,
|
||
|
|
Computer Science Department.
|
||
|
|
|
||
|
|
Diploma thesis J3D Solar System Simulator
|
||
|
|
Originally written by Marcel Portner & Bernhard Hari (c) 2000
|
||
|
|
|
||
|
|
CVS - Information :
|
||
|
|
|
||
|
|
$Header: /var/cvsreps/projects/c450/2000/sss3d/source_diploma/sss3d/calculations/constants/AstronomicalConstants.java,v 1.5 2000/12/12 11:16:46 portm Exp $
|
||
|
|
$Author: portm $
|
||
|
|
$Date: 2000/12/12 11:16:46 $
|
||
|
|
$State: Exp $
|
||
|
|
|
||
|
|
*/
|
||
|
|
package sss3d.calculations.constants;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This class contains all important astronomical constants.<br>
|
||
|
|
* For example AU is equivalent to one astronomical unit (AU):
|
||
|
|
* <pre>
|
||
|
|
* use : AstronomicalConstants.AU = 149597870.66;
|
||
|
|
* </pre>
|
||
|
|
*
|
||
|
|
* @author Marcel Portner & Bernhard Hari
|
||
|
|
* @version $Revision: 1.5 $
|
||
|
|
*/
|
||
|
|
public final class AstronomicalConstants {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The radius of the earth in [km].
|
||
|
|
*/
|
||
|
|
public static final double R_EARTH = 6378.137; // [km]
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The radius of the sun in [km].
|
||
|
|
*/
|
||
|
|
public static final double R_SUN = 696000.0; // [km]
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The radius of the moon in [km].
|
||
|
|
*/
|
||
|
|
public static final double R_MOON = 1737.4; // [km]
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The modified julianish time in the epoch 2000.
|
||
|
|
*/
|
||
|
|
public static final double MJD_J2000 = 51544.5; // MJD der Epoche J2000.0
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The epoch of the year 2000.
|
||
|
|
*/
|
||
|
|
public static final double T_J2000 = 0.0; // Epoche J2000.0
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The epoch of the year 1950.
|
||
|
|
*/
|
||
|
|
public static final double T_B1950 = -0.500002108; // Epoche B1950
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The constant of gravitation.
|
||
|
|
*/
|
||
|
|
public static final double KGAUSS = 0.01720209895; // Gravitationskonstante
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The product of the constant gravitation and the central mass.
|
||
|
|
*/
|
||
|
|
public static final double GM_SUN = KGAUSS * KGAUSS; // [AE^3/d^2]
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The astronomical unit [km].
|
||
|
|
*/
|
||
|
|
public static final double AU = 149597870.66; // astronomical unit [km]
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The speed of light.
|
||
|
|
*/
|
||
|
|
public static final double C_LIGHT = 173.14; // Lichtgeschwindigkeit [AE/d]
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A earth year in days.
|
||
|
|
*/
|
||
|
|
public static final double DAYS = 365.242190;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The 'smallest' exactness of a double value.
|
||
|
|
* Value from the C++ library.
|
||
|
|
*/
|
||
|
|
public static final double EPSILON = 2.2204460492503131E-016;
|
||
|
|
}
|