org.jeospace.physics.orbit
Class Mars

java.lang.Object
  org.jeospace.physics.orbit.SolarWorld
      org.jeospace.physics.orbit.Mars

All Implemented Interfaces:

GeocentricWorld, Identifiable, KineticBody, OrbitalBody, World

public class Mars

extends SolarWorld

Mars, the fourth planet from the Sun. The calculations of orbital motion are derived from an abbreviated form of the VSOP87 as described in Meeus, Astronomical Algorithms, Chapter 31. Additional physical data contained in the class has been obtained from: http://nssdc.gsfc.nasa.gov/planetary/factsheet/marsfact.html

Version:

$Revision: 1.1.1.1 $

Author:

Rex Melton

Field Summary

protected static double	equatorial_radius_kilometers
protected static double	mass_in_kilograms
protected static double	polar_radius_kilometers
protected static double	siderealRotationPeriod_hours

Fields inherited from class org.jeospace.physics.orbit.SolarWorld

LIGHTDAYS_PER_AU

Constructor Summary

Mars()
Construct the default instance

Method Summary

Spherical

getRotationalAxis(double julianDay) Return the position on the celestial sphere that is intersected by a vector along the rotational axis of the world - from it's origin, through the world's the North Pole.

Methods inherited from class org.jeospace.physics.orbit.SolarWorld

getCoordinate, getCoordinate, getEllipsoid, getGeocentricEclipticCoordinate, getGravitationalConstant, getIdentification, getLightTimeCorrectedGeocentricEclipticCoordinate, getLongitudeNormalization, getOrbitalElements, getReferenceFrame, getSiderealRotation, read_periodic_terms

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

equatorial_radius_kilometers

protected static final double equatorial_radius_kilometers

See Also:

Constant Field Values

polar_radius_kilometers

protected static final double polar_radius_kilometers

See Also:

Constant Field Values

mass_in_kilograms

protected static final double mass_in_kilograms

See Also:

Constant Field Values

siderealRotationPeriod_hours

protected static final double siderealRotationPeriod_hours

See Also:

Constant Field Values

Constructor Detail

Mars

public Mars()

Construct the default instance

Method Detail

getRotationalAxis

public Spherical getRotationalAxis(double julianDay)

Return the position on the celestial sphere that is intersected by a vector along the rotational axis of the world - from it's origin, through the world's the North Pole.

Specified by:

getRotationalAxis in interface World

Specified by:

getRotationalAxis in class SolarWorld

Parameters:

julianDay - the time instant at which to calculate the rotational axis alignment

Returns:

the position on the celestial sphere that is 'pointed to' by the rotational axis of the world.