Compute the apparent place of a planet or other solar system body.

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

Syntax

C#
public static short AppPlanet(
	double tjd,
	ref BodyDescription ss_object,
	ref BodyDescription earth,
	ref double ra,
	ref double dec,
	ref double dis
)
Visual Basic
Public Shared Function AppPlanet ( _
	tjd As Double, _
	ByRef ss_object As BodyDescription, _
	ByRef earth As BodyDescription, _
	ByRef ra As Double, _
	ByRef dec As Double, _
	ByRef dis As Double _
) As Short
Visual C++
public:
static short AppPlanet(
	double tjd, 
	BodyDescription% ss_object, 
	BodyDescription% earth, 
	double% ra, 
	double% dec, 
	double% dis
)

Parameters

tjd
Type: System..::..Double
TT (or TDT) Julian date for apparent place.
ss_object
Type: ASCOM.Astrometry..::..BodyDescription%
Structure containing the body designation for the solar system body
earth
Type: ASCOM.Astrometry..::..BodyDescription%
Structure containing the body designation for the Earth
ra
Type: System..::..Double%
OUT: Apparent right ascension in hours, referred to true equator and equinox of date 'tjd'.
dec
Type: System..::..Double%
OUT: Apparent declination in degrees, referred to true equator and equinox of date 'tjd'.
dis
Type: System..::..Double%
OUT: True distance from Earth to planet at 'tjd' in AU.

Return Value

  0...Everything OK.
 >0...See error description in function 'ephemeris'.
 

Remarks

Note: This function only supports Earth, which is a consequence of the implementation used. Please use the NOVAS3.1 or later classes in applications that require planetary or moon ephemeredes as these classes can access the JPL 421 planetary ephemeris data provided as part of the ASCOM distribution.

See Also