Click or drag to resize
NOVAS31NutationAngles Method
Returns the values for nutation in longitude and nutation in obliquity for a given TDB Julian date.

Namespace: ASCOM.Astrometry.NOVAS
Assembly: ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 6.0.0.0 (6.2.0.2774)
Syntax
public void NutationAngles(
	double t,
	Accuracy Accuracy,
	ref double DPsi,
	ref double DEps
)

Parameters

t
Type: SystemDouble
TDB time in Julian centuries since J2000.0
Accuracy
Type: ASCOM.AstrometryAccuracy
Selection for accuracy
DPsi
Type: SystemDouble
Nutation in longitude in arcseconds.
DEps
Type: SystemDouble
Nutation in obliquity in arcseconds.
Remarks
The nutation model selected depends upon the input value of 'Accuracy'. See notes below for important details.

This function selects the nutation model depending first upon the input value of 'Accuracy'. If 'Accuracy' = 0 (full accuracy), the IAU 2000A nutation model is used. If 'Accuracy' = 1 a specially truncated (and therefore faster) version of IAU 2000A, called 'NU2000K' is used.

See Also