Computes the local place of a planet or other solar system body, given the location of the observer.

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

Syntax

C#
public short LocalPlanet(
	double tjd,
	ref BodyDescription ss_object,
	ref BodyDescription earth,
	double deltat,
	ref SiteInfo location,
	ref double ra,
	ref double dec,
	ref double dis
)
Visual Basic
Public Function LocalPlanet ( _
	tjd As Double, _
	ByRef ss_object As BodyDescription, _
	ByRef earth As BodyDescription, _
	deltat As Double, _
	ByRef location As SiteInfo, _
	ByRef ra As Double, _
	ByRef dec As Double, _
	ByRef dis As Double _
) As Short
Visual C++
public:
virtual short LocalPlanet(
	double tjd, 
	BodyDescription% ss_object, 
	BodyDescription% earth, 
	double deltat, 
	SiteInfo% location, 
	double% ra, 
	double% dec, 
	double% dis
) sealed

Parameters

tjd
Type: System..::..Double
TT (or TDT) Julian date for local place.
ss_object
Type: ASCOM.Astrometry..::..BodyDescription%
Pointer to structure containing the body designation for the solar system body
earth
Type: ASCOM.Astrometry..::..BodyDescription%
Pointer to structure containing the body designation for the Earth
deltat
Type: System..::..Double
Difference TT(or TDT)-UT1 at 'tjd', in seconds.
location
Type: ASCOM.Astrometry..::..SiteInfo%
Pointer to structure containing observer's location
ra
Type: System..::..Double%
OUT: Local right ascension in hours, referred to mean equator and equinox of J2000.
dec
Type: System..::..Double%
OUT: Local declination in degrees, referred to mean equator and equinox of J2000.
dis
Type: System..::..Double%
OUT: True distance from Earth to planet 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