Equinox

public enum Equinox : CustomStringConvertible

Standard equinox values. Note: equinoxes are directions, epochs are point in time. The vernal equinox, which is the zero point of both right ascension and celestial longitude, is defined to be in the direction of the ascending node of the ecliptic on the equator. Of course, at the standard epoch of J2000 corresponds to a specific (and thus standard) equinox.

  • The mean equinox of the date is the intersection of the ecliptic of the date with the mean equator of the date.

    Declaration

    Swift

    case meanEquinoxOfTheDate(JulianDay)
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  • The standard 2000 equinox: January 1st, 2000, in the Julian calendar (1 year = 365.25 days).

    Declaration

    Swift

    case standardJ2000
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  • The standard 1950 equinox: January 1st, 1950, in the Besselian calendar (1 year = 365.2421988 days in AD1900, that is, the length of the tropical year).

    Declaration

    Swift

    case standardB1950
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  • Declaration

    Swift

    public var description: String { get }
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