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When::Ephemeris::Shadow

The Shadow of the Earth

Public Instance Methods

apparent_radius(t, base=nil) click to toggle source

視半径 / CIRCLE

  t       : ユリウス日(Terrestrial Time)または(Temporal)Positionオブジェクト
  base    : When::Coordinates::Spatial or When::Ephemeris::Datuml
    観測地
     # File when/region/moon.rb, line 271
271:       def apparent_radius(t, base=nil)
272:         t  = +t
273:         rr = Sun.pi(t) * AU
274:         (asin(Ephemeris::Shadow.radius/AU/Moon.pi(t)) -
275:          asin(Ephemeris::Sun.radius/rr)               +
276:          asin(Ephemeris::Shadow.radius/rr)) * 1.02 / CIRCLE
277:       end

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