Package 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
    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 Details

    • 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