net.time4j.calendar.astro

Class MoonPosition

java.lang.Object

net.time4j.calendar.astro.MoonPosition

All Implemented Interfaces:

java.io.Serializable

public class MoonPosition
extends java.lang.Object
implements java.io.Serializable

Contains methods for calculating the position of the moon.

The position refers to the gemometric center of the moon.

Since:

3.38/4.33

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static MoonPosition	at(Moment moment, GeoLocation location) Calculates the position of moon at given moment and geographical location.
boolean	equals(java.lang.Object obj)
double	getAzimuth() Obtains the azimuth of moon in degrees (compass orientation).
double	getDeclination() Obtains the declination of moon in degrees.
double	getDistance() Obtains the distance between the centers of earth and moon in kilometers.
double	getElevation() Obtains the elevation of moon relative to the horizon in degrees.
double	getRightAscension() Obtains the right ascension of moon in degrees.
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

at

public static MoonPosition at(Moment moment,
                              GeoLocation location)

Calculates the position of moon at given moment and geographical location.

Parameters:

moment - the time when the position of moon is to be determined

location - geographical location of observer

Returns:

moon position

getRightAscension

public double getRightAscension()

Obtains the right ascension of moon in degrees.

Returns:

double

getDeclination

public double getDeclination()

Obtains the declination of moon in degrees.

Returns:

double

getAzimuth

public double getAzimuth()

Obtains the azimuth of moon in degrees (compass orientation).

The azimuth is the result of a coordinate transformation of right ascension and declination to the horizon system.

Returns:

azimuth in degrees measured from the north (compass orientation)

getElevation

public double getElevation()

Obtains the elevation of moon relative to the horizon in degrees.

The elevation is the result of a coordinate transformation of right ascension and declination to the horizon system.

Returns:

elevation in degrees (positive if above the horizon and negative if below the horizon)

getDistance

public double getDistance()

Obtains the distance between the centers of earth and moon in kilometers.

Returns:

double

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object