palPm palPm - Apply corrections for proper motion a star RA,Dec

Description:

Apply corrections for proper motion to a star RA,Dec using the SOFA routine iauStarpm.

Invocation:

void palPm ( double r0, double d0, double pr, double pd, double px, double rv, double ep0, double ep1, double $*$r1, double $*$d1 );

Arguments:

r0 = double (Given)

RA at epoch ep0 (radians)

d0 = double (Given)

Dec at epoch ep0 (radians)

pr = double (Given)

RA proper motion in radians per year.

pd = double (Given)

Dec proper motion in radians per year.

px = double (Given)

Parallax (arcsec)

rv = double (Given)

Radial velocity (km/sec $+$ve if receding)

ep0 = double (Given)

Start epoch in years, assumed to be Julian.

ep1 = double (Given)

End epoch in years, assumed to be Julian.

r1 = double $*$ (Returned)

RA at epoch ep1 (radians)

d1 = double $*$ (Returned)

Dec at epoch ep1 (radians)

Notes:

• Uses iauStarpm but ignores the status returns from that routine. In particular note that parallax should not be zero when the proper motions are non-zero. SLA/F allows parallax to be zero.

• Assumes all epochs are Julian epochs.