NovasNutationAngles Method

Returns the values for nutation in longitude and nutation in obliquity for a given TDB Julian date.

Definition

Namespace: ASCOM.Tools.Novas31
Assembly: ASCOM.AstrometryTools (in ASCOM.AstrometryTools.dll) Version: 3.0.0-rc.1+86c25ce733aebb4d8b1b8a62e84770ea5e972bea
C#
public static void NutationAngles(
	double t,
	Accuracy Accuracy,
	ref double DPsi,
	ref double DEps
)

Parameters

t  Double
TDB time in Julian centuries since J2000.0
Accuracy  Accuracy
Selection for accuracy
DPsi  Double
Nutation in longitude in arcseconds.
DEps  Double
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.

Version Information

.NET Standard

Supported in: 2.0

See Also