grahan — the open-source sky engine
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    Function ttFromUt

    • Convert a UT Julian day to a TT Julian day by adding ΔT.

      Parameters

      • utJd: number

      Returns number

      ttFromUt(2451544.5); // ≈ 2451544.50074 (ΔT ≈ 64 s in 2000)

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