Precesses equatorial rectangular coordinates from one epoch to another.

Namespace: ASCOM.Astrometry.NOVAS
Assembly: ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 6.0.0.0 (6.1.1.2619)

Syntax

C#
public void Precession(
	double tjd1,
	double[] pos,
	double tjd2,
	ref double[] pos2
)
Visual Basic
Public Sub Precession ( _
	tjd1 As Double, _
	pos As Double(), _
	tjd2 As Double, _
	ByRef pos2 As Double() _
)
Visual C++
public:
virtual void Precession(
	double tjd1, 
	array<double>^ pos, 
	double tjd2, 
	array<double>^% pos2
) sealed

Parameters

tjd1
Type: System..::..Double
TDB Julian date of first epoch.
pos
Type: array<System..::..Double>[]()[][]
Position vector, geocentric equatorial rectangular coordinates, referred to mean equator and equinox of first epoch.
tjd2
Type: System..::..Double
TDB Julian date of second epoch.
pos2
Type: array<System..::..Double>[]()[][]%
OUT: Position vector, geocentric equatorial rectangular coordinates, referred to mean equator and equinox of second epoch.

Remarks

The coordinates are referred to the mean equator and equinox of the two respective epochs.

See Also