NovasPlace Method

public static short Place(
	double JdTt,
	Object3 CelObject,
	Observer Location,
	double DeltaT,
	CoordSys CoordSys,
	Accuracy Accuracy,
	ref SkyPos Output
)

Public Shared Function Place ( 
	JdTt As Double,
	CelObject As Object3,
	Location As Observer,
	DeltaT As Double,
	CoordSys As CoordSys,
	Accuracy As Accuracy,
	ByRef Output As SkyPos
) As Short

Parameters

JdTt  Double

TT Julian date for place.

CelObject  Object3

Specifies the celestial object of interest

Location  Observer

Specifies the location of the observer

DeltaT  Double

Difference TT-UT1 at 'JdTt', in seconds of time.

CoordSys  CoordSys

Code specifying coordinate system of the output position. 0 ... GCRS or "local GCRS"; 1 ... true equator and equinox of date; 2 ... true equator and CIO of date; 3 ... astrometric coordinates, i.e., without light deflection or aberration.

Accuracy  Accuracy

Selection for accuracy

Output  SkyPos

Structure specifying object's place on the sky at time 'JdTt', with respect to the specified output coordinate system

Return Value

            = 0         ... No problems.
            = 1         ... invalid value of 'CoordSys'
            = 2         ... invalid value of 'Accuracy'
            = 3         ... Earth is the observed object, and the observer is either at the geocenter or on the Earth's surface (not permitted)
            > 10, < 40  ... 10 + error from function 'Ephemeris'
            > 40, < 50  ... 40 + error from function 'GeoPosVel'
            > 50, < 70  ... 50 + error from function 'LightTime'
            > 70, < 80  ... 70 + error from function 'GravDef'
            > 80, < 90  ... 80 + error from function 'CioLocation'
            > 90, < 100 ... 90 + error from function 'CioBasis'
            

Reference