cds.astro
Class FK5
java.lang.Object
cds.astro.Astroframe
cds.astro.Equatorial
cds.astro.FK5
- All Implemented Interfaces:
- java.io.Serializable
public class FK5
- extends Equatorial
The FK5 is an equatorial coordinate system (coordinate system linked to
the Earth) based on its J2000 position.
As any equatorial frame, the FK5-based follows the long-term
Earth motion (precession).
- Author:
- Francois Ochsenbein (CDS)
- See Also:
- Serialized Form
Constructor Summary |
FK5()
Instanciate an FK5 frame (at default J2000 equinox) |
FK5(double equinox)
Instanciate an FK5 frame |
Method Summary |
double[][] |
toICRSmatrix()
Defines the rotation matrix to rotate to ICRS |
Methods inherited from class java.lang.Object |
getClass, hashCode, notify, notifyAll, wait, wait, wait |
FK5
public FK5(double equinox)
- Instanciate an FK5 frame
- Parameters:
equinox
- the equinox of definition, in Julian Year.
FK5
public FK5()
- Instanciate an FK5 frame (at default J2000 equinox)
toICRSmatrix
public double[][] toICRSmatrix()
- Defines the rotation matrix to rotate to ICRS
- Specified by:
toICRSmatrix
in class Astroframe
- Returns:
- the 3x3 rotation matrix to convert a position to ICRS frame
Copyright © 2009 UDS/CNRS