grahan — the open-source sky engine
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    Function siderealLongitude

    • Convert a tropical ecliptic longitude to sidereal (Lahiri), degrees [0, 360).

      Parameters

      • tropicalLongitude: number
      • jdUt: number

      Returns number

      siderealLongitude(145.281, 2449217.71875); // ≈ 121.513 (Leo 1°30′)

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