DME Component Libraries for .NET 2025 r1
Library Reference
AGI.Foundation.Coordinates
OrbitalElements Class
OrbitalElements Methods
ComputeEccentricity Method
ComputeMeanMotion Method
ComputePeriod Method
ComputeRadiusOfApoapsis Method
ComputeRadiusOfPeriapsis Method
ComputeSemilatusRectum Method
ComputeSemimajorAxis Method
ComputeTimeOfFlight Method
ConvertEccentricAnomalyToMeanAnomaly Method
ConvertEccentricAnomalyToTimeFromPeriapsis Method
ConvertEccentricAnomalyToTrueAnomaly Method
ConvertHyperbolicAnomalyToMeanAnomaly Method
ConvertHyperbolicAnomalyToTimeFromPeriapsis Method
ConvertHyperbolicAnomalyToTrueAnomaly Method
ConvertMeanAnomalyToEccentricAnomaly Method
ConvertMeanAnomalyToHyperbolicAnomaly Method
ConvertMeanAnomalyToParabolicAnomaly Method
ConvertMeanAnomalyToTimeFromPeriapsis Method
ConvertMeanAnomalyToTimeSincePreviousPeriapsis Method
ConvertMeanAnomalyToTimeUntilNextPeriapsis Method
ConvertMeanAnomalyToTrueAnomaly Method
ConvertParabolicAnomalyToMeanAnomaly Method
ConvertParabolicAnomalyToTimeFromPeriapsis Method
ConvertParabolicAnomalyToTrueAnomaly Method
ConvertTimeFromPeriapsisToEccentricAnomaly Method
ConvertTimeFromPeriapsisToHyperbolicAnomaly Method
ConvertTimeFromPeriapsisToMeanAnomaly Method
ConvertTimeFromPeriapsisToParabolicAnomaly Method
ConvertTimeFromPeriapsisToTrueAnomaly Method
ConvertTrueAnomalyToEccentricAnomaly Method
ConvertTrueAnomalyToHyperbolicAnomaly Method
ConvertTrueAnomalyToMeanAnomaly Method
ConvertTrueAnomalyToParabolicAnomaly Method
ConvertTrueAnomalyToTimeFromPeriapsis Method
ConvertTrueAnomalyToTimeSincePreviousPeriapsis Method
ConvertTrueAnomalyToTimeUntilNextPeriapsis Method
PerifocalToCartesianMatrix Method
TryComputeEccentricity Method
TryComputeMeanMotion Method
TryComputePeriod Method
TryComputeRadiusOfApoapsis Method
TryComputeRadiusOfPeriapsis Method
TryComputeSemilatusRectum Method
TryComputeSemimajorAxis Method
TryComputeTimeOfFlight Method
TryConvertEccentricAnomalyToMeanAnomaly Method
TryConvertEccentricAnomalyToTimeFromPeriapsis Method
TryConvertEccentricAnomalyToTrueAnomaly Method
TryConvertHyperbolicAnomalyToMeanAnomaly Method
TryConvertHyperbolicAnomalyToTimeFromPeriapsis Method
TryConvertHyperbolicAnomalyToTrueAnomaly Method
TryConvertMeanAnomalyToEccentricAnomaly Method
TryConvertMeanAnomalyToHyperbolicAnomaly Method
TryConvertMeanAnomalyToParabolicAnomaly Method
TryConvertMeanAnomalyToTimeFromPeriapsis Method
TryConvertMeanAnomalyToTimeSincePreviousPeriapsis Method
TryConvertMeanAnomalyToTimeUntilNextPeriapsis Method
TryConvertMeanAnomalyToTrueAnomaly Method
TryConvertParabolicAnomalyToMeanAnomaly Method
TryConvertParabolicAnomalyToTimeFromPeriapsis Method
TryConvertParabolicAnomalyToTrueAnomaly Method
TryConvertTimeFromPeriapsisToEccentricAnomaly Method
TryConvertTimeFromPeriapsisToHyperbolicAnomaly Method
TryConvertTimeFromPeriapsisToMeanAnomaly Method
TryConvertTimeFromPeriapsisToParabolicAnomaly Method
TryConvertTimeFromPeriapsisToTrueAnomaly Method
TryConvertTrueAnomalyToEccentricAnomaly Method
TryConvertTrueAnomalyToHyperbolicAnomaly Method
TryConvertTrueAnomalyToMeanAnomaly Method
TryConvertTrueAnomalyToParabolicAnomaly Method
TryConvertTrueAnomalyToTimeFromPeriapsis Method
TryConvertTrueAnomalyToTimeSincePreviousPeriapsis Method
TryConvertTrueAnomalyToTimeUntilNextPeriapsis Method
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OrbitalElementsComputeSemimajorAxis Method

Calculates the semimajor axis of the orbit.

Namespace:  AGI.Foundation.Coordinates
Assembly:  AGI.Foundation.Core (in AGI.Foundation.Core.dll) Version: 25.1.421.0 (25.1.421.0)
Syntax
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public static double ComputeSemimajorAxis(
	double radiusOfPeriapsis,
	double eccentricity
)

Parameters

radiusOfPeriapsis
Type: SystemDouble
The radius of periapsis.
eccentricity
Type: SystemDouble
The eccentricity of the orbit.

Return Value

Type: Double
The semimajor axis of the orbit.
Exceptions
ExceptionCondition
ArgumentOutOfRangeExceptionThrown when eccentricity is negative or radiusOfPeriapsis is negative or zero.
Remarks
The result will be given in the same units as radiusOfPeriapsis.
See Also