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-/*
-*+
-* Name:
-* palFk54z
-
-* Purpose:
-* Convert a J2000.0 FK5 star position to B1950.0 FK4 assuming
-* zero proper motion and parallax.
-
-* Language:
-* Starlink ANSI C
-
-* Type of Module:
-* Library routine
-
-* Invocation:
-* palFk54z( double r2000, double d2000, double bepoch, double *r1950,
-* double *d1950, double *dr1950, double *dd1950 )
-
-* Arguments:
-* r2000 = double (Given)
-* J2000.0 FK5 RA (radians).
-* d2000 = double (Given)
-* J2000.0 FK5 Dec (radians).
-* bepoch = double (Given)
-* Besselian epoch (e.g. 1950.0).
-* r1950 = double * (Returned)
-* B1950 FK4 RA (radians) at epoch "bepoch".
-* d1950 = double * (Returned)
-* B1950 FK4 Dec (radians) at epoch "bepoch".
-* dr1950 = double * (Returned)
-* B1950 FK4 proper motion (RA) (radians/trop.yr)).
-* dr1950 = double * (Returned)
-* B1950 FK4 proper motion (Dec) (radians/trop.yr)).
-
-* Description:
-* This function converts star positions from the IAU 1976,
-* FK5, Fricke system to the Bessel-Newcomb, FK4 system.
-
-* Notes:
-* - The proper motion in RA is dRA/dt rather than cos(Dec)*dRA/dt.
-* - Conversion from Julian epoch 2000.0 to Besselian epoch 1950.0
-* only is provided for. Conversions involving other epochs will
-* require use of the appropriate precession functions before and
-* after this function is called.
-* - The FK5 proper motions, the parallax and the radial velocity
-* are presumed zero.
-* - It is the intention that FK5 should be a close approximation
-* to an inertial frame, so that distant objects have zero proper
-* motion; such objects have (in general) non-zero proper motion
-* in FK4, and this function returns those fictitious proper
-* motions.
-* - The position returned by this function is in the B1950
-* reference frame but at Besselian epoch BEPOCH. For comparison
-* with catalogues the "bepoch" argument will frequently be 1950.0.
-
-* Authors:
-* PTW: Pat Wallace (STFC)
-* DSB: David Berry (JAC, Hawaii)
-* {enter_new_authors_here}
-
-* History:
-* 2012-02-13 (DSB):
-* Initial version with documentation taken from Fortran SLA
-* Adapted with permission from the Fortran SLALIB library.
-* {enter_further_changes_here}
-
-* Copyright:
-* Copyright (C) 1995 Rutherford Appleton Laboratory
-* Copyright (C) 2012 Science and Technology Facilities Council.
-* All Rights Reserved.
-
-* Licence:
-* This program is free software: you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public
-* License as published by the Free Software Foundation, either
-* version 3 of the License, or (at your option) any later
-* version.
-*
-* This program is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-* GNU Lesser General Public License for more details.
-*
-* You should have received a copy of the GNU Lesser General
-* License along with this program. If not, see
-* <http://www.gnu.org/licenses/>.
-
-* Bugs:
-* {note_any_bugs_here}
-*-
-*/
-
-#include "pal.h"
-#include "pal1sofa.h"
-
-void palFk54z( double r2000, double d2000, double bepoch, double *r1950,
- double *d1950, double *dr1950, double *dd1950 ){
-
-/* Local Variables: */
- double r, d, px, rv, y;
-
-/* FK5 equinox J2000 (any epoch) to FK4 equinox B1950 epoch B1950. */
- palFk524( r2000, d2000, 0.0, 0.0, 0.0, 0.0, &r, &d, dr1950, dd1950,
- &px, &rv );
-
-/* Fictitious proper motion to epoch "bepoch". */
- y = bepoch - 1950.0;
- *r1950 = r + *dr1950*y;
- *d1950 = d + *dd1950*y;
-
-}
-