VSOPTOP2013 1.0.0

dotnet add package VSOPTOP2013 --version 1.0.0
NuGet\Install-Package VSOPTOP2013 -Version 1.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="VSOPTOP2013" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add VSOPTOP2013 --version 1.0.0
#r "nuget: VSOPTOP2013, 1.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install VSOPTOP2013 as a Cake Addin
#addin nuget:?package=VSOPTOP2013&version=1.0.0

// Install VSOPTOP2013 as a Cake Tool
#tool nuget:?package=VSOPTOP2013&version=1.0.0


An implementation of the analytic planetary solutions published by G. Francou and J. L. Simon of the Paris Observatory. For a given date and time from -4000 to +8000, returns the position and velocity of any planet 1-9 using VSOP or 5-9 using TOP. VSOP/TOP2013 is a CLS-compliant library targeted to .NET Standard 2.0.

How to Use

A Planet object may be obtained by index or name. Then the Position method may be called with the desired Barycentric Dynamical Time (TDB) expressed as a Julian date. The method returns an orbital coordinate containing position and velocity of the planet at that time. Examples:

// Construct by 1-based index. VSOP is the default solution.
Planet myPlanet = new Planet(2);

// Construct by enumerated index.
Planet myPlanet = new Planet(Planets.Venus);

// Construct by name.
Planet myPlanet = new Planet("Venus");

// Construct by name and specify TOP solution. Valid only for the outer planets.
Planet myPlanet = new Planet("Saturn", true);

// Call Position method for TDB 2411545 and return result in J2000.0 ecliptical coordinates.
OrbitalCoordinate myCoordinate = myPlanet.Position(2411545, Frame.J2000);

	// X: -8.51511074854885, Y: 3.69589695443049, Z: 0.272426618537697
	// VelocityX: -0.00251503644983892, VelocityY: -0.00512845140735252, VelocityZ: 0.000190225351577721
	// Frame: J2000

// Call Position method for TDB 2459543.5 and return result in ICRF equatorial coordinates.
OrbitalCoordinate myCoordinate = myPlanet.Position(2459543.5, Frame.ICRF);

	// X: 6.82294199648418, Y: -6.55672280255307, Z: -3.00201564910881
	// VelocityX: 0.00374508722196133, VelocityY: 0.00359950179347434, VelocityZ: 0.00132560239628805
	// Frame: ICRF
Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETStandard 2.0

    • No dependencies.

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Version Downloads Last updated
1.0.0 496 11/30/2021

Initial release. Sample outputs agree with FORTRAN control outputs as rounded.