org.jeospace.util
Class StellarUtils

java.lang.Object
  org.jeospace.util.StellarUtils

public abstract class StellarUtils

extends java.lang.Object

Utility methods for handling stellar magnitudes and spectral color.

Version:

$Revision: 1.1.1.1 $

Author:

Rex Melton

Constructor Summary

StellarUtils()

Method Summary

static double	getAbsoluteMagnitude(double apparentMagnitude, double parallax) Return the absolute magnitude of a star given it's apparent magnitude and parallax
static double	getAbsoluteMagnitude(double apparentMagnitude, Length distance) Return the absolute magnitude of a star given it's apparent magnitude and distance
static double	getApparentMagnitude(double absoluteMagnitude, Length distance) Return the apparent magnitude of a star given it's absolute magnitude and distance
static void	main(java.lang.String[] args) test cases
static java.awt.Color	matchSpectralType(java.lang.String type)

Methods inherited from class java.lang.Object

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

Constructor Detail

StellarUtils

public StellarUtils()

Method Detail

getAbsoluteMagnitude

public static double getAbsoluteMagnitude(double apparentMagnitude,
                                          Length distance)

Return the absolute magnitude of a star given it's apparent magnitude and distance

Parameters:

apparentMagnitude - the apparent magnitude of the star

distance - the distance of the star

Returns:

the star's absolute magnitude

getAbsoluteMagnitude

public static double getAbsoluteMagnitude(double apparentMagnitude,
                                          double parallax)

Return the absolute magnitude of a star given it's apparent magnitude and parallax

Parameters:

apparentMagnitude - the apparent magnitude of the star

parallax - the parallax of the star in arc seconds

Returns:

the star's absolute magnitude

getApparentMagnitude

public static double getApparentMagnitude(double absoluteMagnitude,
                                          Length distance)

Return the apparent magnitude of a star given it's absolute magnitude and distance

Parameters:

absoluteMagnitude - the apparent magnitude of the star

distance - the distance of the star

Returns:

the star's absolute magnitude

main

public static void main(java.lang.String[] args)

test cases

matchSpectralType

public static java.awt.Color matchSpectralType(java.lang.String type)