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

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

Syntax

C#
public short CioRa(
	double JdTt,
	Accuracy Accuracy,
	ref double RaCio
)
Visual Basic
Public Function CioRa ( _
	JdTt As Double, _
	Accuracy As Accuracy, _
	ByRef RaCio As Double _
) As Short
Visual C++
public:
virtual short CioRa(
	double JdTt, 
	Accuracy Accuracy, 
	double% RaCio
) sealed

Parameters

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

Return Value

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

Remarks