Use of this function is appropriate when efficiency is important and where many star positions, all with parallax and proper motion either zero or already allowed for, and all referred to the same equator and equinox, are to be transformed for one epoch. The star-independent parameters can be obtained by calling the palMappa function.
The corresponding function for the case of non-zero parallax and proper motion is palMapqk.
The reference systems and timescales used are IAU 2006.
Strictly speaking, the function is not valid for solar-system sources, though the error will usually be extremely small.