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SaturnRingSystem Structure Reference
SaturnRingSystem
public struct SaturnRingSystem/ Saturn has many rings. Here we consider the ring system as a whole.
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Undocumented
Declaration
Swift
public fileprivate(set) var julianDay: JulianDay { get } -
The Saturnicentric coordinates of the Earth referred to the plane of the ring (B)
Declaration
Swift
public var earthCoordinates: SaturnicentricCoordinates { get } -
The Saturnicentric coordinates of the Sun referred to the plane of the ring (B)
Declaration
Swift
public var sunCoordinates: SaturnicentricCoordinates { get } -
The difference between the Saturnicentric longitude of the Sun and the Earth, measured in the plane of the ring. Used to compute Saturn’s magnitude.
Declaration
Swift
public var saturnicentricSunEarthLongitudesDifference: Degree { get } -
The position angle of the north pole of rotation of the planet. Because the ring is situated exactly in Saturn’s equator plane, P is also the geocentric position angle of the northern semiminor axis of the apparent ellipse of the ring, measured from the North towards the East (trust me… see AA p.317)
Declaration
Swift
public var northPolePositionAngle: Degree { get } -
The major axis of the outer edge of the outer ring.
Declaration
Swift
public var majorAxis: ArcSecond { get } -
The minor axis of the outer edge of the outer ring.
Declaration
Swift
public var minorAxis: ArcSecond { get }