palMapqkz palMapqkz - Quick mean to apparent place

Description:
Quick mean to apparent place: transform a star RA,dec from mean place to geocentric apparent place, given the star-independent parameters, and assuming zero parallax and proper motion.

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.


Invocation:
void palMapqkz( double rm, double dm, double amprms[21], double $*$ra, double $*$da )

Arguments:

rm = double (Given)
Mean RA (radians).
dm = double (Given)
Mean Dec (radians).
amprms = double[21] (Given)
Star-independent mean-to-apparent parameters (see palMappa): (0-3) not used (4-6) not used (7) not used (8-10) abv: barycentric Earth velocity in units of c (11) sqrt(1-v$*$$*$2) where v=modulus(abv) (12-20) precession/nutation (3,3) matrix
ra = double $*$ (Returned)
Apparent RA (radians).
da = double $*$ (Returned)
Apparent Dec (radians).