NovasCioRa Method

Computes the true right ascension of the celestial intermediate origin (CIO) at a given TT Julian date. This is -(equation of the origins).

Definition

Namespace: ASCOM.Tools.Novas31
Assembly: ASCOM.AstrometryTools (in ASCOM.AstrometryTools.dll) Version: 3.0.0-rc.1+86c25ce733aebb4d8b1b8a62e84770ea5e972bea

C#

public static short CioRa(
	double JdTt,
	Accuracy Accuracy,
	ref double RaCio
)

VB

Public Shared Function CioRa ( 
	JdTt As Double,
	Accuracy As Accuracy,
	ByRef RaCio As Double
) As Short

Parameters

JdTt Double: TT Julian date
Accuracy Accuracy: Selection for accuracy
RaCio Double: Right ascension of the CIO, with respect to the true equinox of date, in hours (+ or -).

Return Value

Int16

              0  ... everything OK
              1  ... invalid value of 'Accuracy'
            > 10 ... 10 + the error code from function 'CioLocation'
            > 20 ... 20 + the error code from function 'CioBasis'.

Version Information

.NET Standard

Supported in: 2.0