NovasCioLocation Method

Returns the location of the celestial intermediate origin (CIO) for a given Julian date, as a right ascension

Definition

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

C#

public static short CioLocation(
	double JdTdb,
	Accuracy Accuracy,
	ref double RaCio,
	ref ReferenceSystem RefSys
)

VB

Public Shared Function CioLocation ( 
	JdTdb As Double,
	Accuracy As Accuracy,
	ByRef RaCio As Double,
	ByRef RefSys As ReferenceSystem
) As Short

Parameters

JdTdb Double: TDB Julian date.
Accuracy Accuracy: Selection for accuracy
RaCio Double: Right ascension of the CIO, in hours.
RefSys ReferenceSystem: Reference system in which right ascension is given

Return Value

Int16

               0 ... everything OK
               1 ... unable to allocate memory for the 'cio' array
            > 10 ... 10 + the error code from function 'CioArray'.

Remarks

This function returns the location of the celestial intermediate origin (CIO) for a given Julian date, as a right ascension with respect to either the GCRS (geocentric ICRS) origin or the true equinox of date. The CIO is always located on the true equator (= intermediate equator) of date.

Version Information

.NET Standard

Supported in: 2.0