Quick Mean to Apparent
CALL sla_MAPQK (RM, DM, PR, PD, PX, RV, AMPRMS, RA, DA)
RM,DM  D  mean $\left[\phantom{\rule{0.3em}{0ex}}\alpha ,\delta \phantom{\rule{0.3em}{0ex}}\right]$ (radians) 


PR,PD  D  proper motions: $\left[\phantom{\rule{0.3em}{0ex}}\alpha ,\delta \phantom{\rule{0.3em}{0ex}}\right]$ changes per Julian year 
 
PX  D  parallax (arcsec) 


RV  D  radial velocity (km s${}^{1}$, +ve if receding) 
 
AMPRMS  D(21)  starindependent meantoapparent parameters: 
 
(1) 
 time interval for proper motion (Julian years) 
(24) 
 barycentric position of the Earth (AU) 
(57) 
 heliocentric direction of the Earth (unit vector) 
(8) 
 (gravitational radius of Sun)$\times 2/$(SunEarth distance) 
(911) 
 v: barycentric Earth velocity in units of c 
(12) 
 $\sqrt{1{\left\text{v}\right}^{2}}$ 
(1321) 
 precessionnutation $3\times 3$ matrix 
RA,DA  D  apparent $\left[\phantom{\rule{0.3em}{0ex}}\alpha ,\delta \phantom{\rule{0.3em}{0ex}}\right]$ (radians) 