T2JD:

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   Converts Julian centuries from J2000.0 to days

   Since version 1.
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   Form:
   jd = T2JD( T )
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   ------
   Inputs
   ------
   T      (1,:)  Julian centuries of 86400s dynamical time from j2000.0

   -------
   Outputs
   -------
   jd     (1,:)  Julian date (days)

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