net.time4j.calendar.astro

Interface EquatorialCoordinates

All Known Implementing Classes:

MoonPosition, SunPosition

public interface EquatorialCoordinates

Describes a celestial coordinate system which projects the earth equator and poles onto the celestial sphere using right ascension and declination in the reference frame J2000 as epoch.

See also: Wikipedia. The effect of precession will have an impact on right ascension and declination if times far away from year 2000 are considered.

Since:

4.37

Author:

Meno Hochschild

Method Summary

Modifier and Type	Method and Description
double	getDeclination() Obtains the declination in degrees.
double	getRightAscension() Obtains the right ascension in degrees.
default String	getRightAscensionHMS() Obtains the right ascension in HMS-format ##H:MM:SS where a fraction of second will be truncated.

Method Detail

getRightAscensionHMS

default String getRightAscensionHMS()

Obtains the right ascension in HMS-format ##H:MM:SS where a fraction of second will be truncated.

Returns:

String

getRightAscension

double getRightAscension()

Obtains the right ascension in degrees.

Returns:

double in range 0-360

getDeclination

double getDeclination()

Obtains the declination in degrees.

Returns:

double