Magnitude

public struct Magnitude : NumericType

The Magnitude is a unit of flux.

  • The Magnitude value

    Declaration

    Swift

    public let value: Double
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  • Creates a new Magnitude instance.

    Declaration

    Swift

    public init(_ value: Double)

    Parameters

    value

    The Magnitude value
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  • Combine two magnitudes.

    Declaration

    Swift

    func combine(with m2: Magnitude) -> Magnitude

    Parameters

    m2

    The secondary magnitude

    Return Value

    The combined magnitude.

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  • Compute the brightness ratio, for a given secondary magnitude.

    Declaration

    Swift

    func brightnessRatio(with m2: Magnitude) -> Double

    Parameters

    m2

    The other magnitude.

    Return Value

    The brightness ratio.

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  • Compute the geometrical distance, in parsec, for the current apparent magnitude.

    Declaration

    Swift

    func distance(forAbsoluteMagnitude M: Magnitude, visualAbsorption Av: Magnitude = 0.0) -> Parsec

    Parameters

    M

    The absolute magnitude of the object.
    Av

    The visual absorption factor.

    Return Value

    The distance, in parsec.

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  • Compute the magnitude difference for a given brightness ratio.

    Declaration

    Swift

    static func magnitudeDifference(forBrightnessRatio r: Double) -> Magnitude

    Parameters

    r

    The brightness ratio.

    Return Value

    The magnitude difference.

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