Convert a Julian-Day number to a time in julian centuries since noon on January 1, 1900. The method follows Meese (1982 equation 15.1). The example reproduces the example provided by Meeuse (1982 example 15.a), with fractional error 3e-8.
a julian day number, e.g. as given by
Julian century since noon on January 1, 1900.
Meeus, Jean, 1982. Astronomical formuae for Calculators. Willmann-Bell. Richmond VA, USA. 201 pages
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