UVSOP87 | Unreal Engine 5.8 Documentation

API > API/Plugins > API/Plugins/CelestialVault

From VSOP87.doc in https://ftp.imcce.fr/pub/ephem/planets/vsop87/

Here we extracted the VSOP87 coefficients from the FORTRAN Tables, and generated constant arrays in VSOP87/VSOP87A_.h

Being given a Julian date JD expressed in dynamical time (TAI+32.184s) and a body (planets, Earth-Moon Barycenter, or Sun) associated to a version of the theory VSOP87 : 1/ select the file corresponding to the body and the version, 2/ read sequentially the terms of the series in the records of the file, 3/ apply for each term the formulae (1) or (2) with T=(JD-2451545)/365250, 4/ add up the terms so computed for every one coordinate.


Name	UVSOP87
Type	class
Header File	/Engine/Plugins/Runtime/CelestialVault/Source/CelestialVault/Public/VSOP87.h
Include Path	#include "VSOP87.h"

Syntax

UCLASS ()  
class UVSOP87 : public UBlueprintFunctionLibrary

Inheritance Hierarchy

UObjectBase → UObjectBaseUtility → UObject → UBlueprintFunctionLibrary → UVSOP87

Functions

Static

Name	Remarks	Include Path	Unreal Specifiers
static double EvaluateCoordinate ( const VSOP87Block(&) Blocks, const int32 IndexesForAccuracy, double VSOP87Time )	Evaluate the VSOP87 Coefficients for the data arrays a of specific body, to compute its Location	VSOP87.h
static double EvaluateVelocity ( const VSOP87Block(&) Blocks, const int32 IndexesForAccuracy, double VSOP87Time )	Evaluate the VSOP87 Coefficients for the data arrays a of specific body, to compute its Velocity	VSOP87.h
static FVector GetEarthLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Earth location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetEarthVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Earth velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetEMBLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Earth Moon Barycenter location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetEMBVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Earth Moon Barycenter velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetJupiterLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Jupiter location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetJupiterVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Jupiter velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetMarsLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Mars location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetMarsVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Mars velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetMercuryLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Mercury location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetMercuryVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Mercury velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetMoonLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Moon location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetMoonVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Moon velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetNeptuneLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Neptune location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetNeptuneVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Neptune velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetSaturnLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Saturn location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetSaturnVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Saturn velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetUranusLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Uranus location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetUranusVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Uranus velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetVenusLocation ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Venus location in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"
static FVector GetVenusVelocity ( double VSOP87Time, EVSOP87Accuracy Accuracy )	Return the Venus velocity in the VSOP87 Dynamical Ecliptic Frame J2000 - Note the input time is a specific VSOP87 Time, not Julian Days	VSOP87.h	BlueprintCallable Category="Celestial Vault\|VSOP87"

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