SLA_PM - Proper Motion   

ACTION:

Apply corrections for proper motion to a star $[\,\alpha,\delta\,]$.

CALL:

CALL sla_PM (R0, D0, PR, PD, PX, RV, EP0, EP1, R1, D1)

GIVEN:

$$[\,\alpha,\delta\,]$$ R0,D0

$$[\,\alpha,\delta\,]$$ PR,PD D

PX D parallax (arcsec)

RV D radial velocity (km s^-1, +ve if receding)

EP0 D start epoch in years (e.g. Julian epoch)

EP1 D end epoch in years (same system as EP0)

RETURNED:

$$[\,\alpha,\delta\,]$$ R1,D1

NOTE:

The $\alpha$ proper motions are $\dot{\alpha}$ rather than $\dot{\alpha}\cos\delta$, and are in the same coordinate system as R0,D0.

REFERENCES:

1.

1984 Astronomical Almanac, pp B39-B41.

2.

Lederle & Schwan, 1984. Astr. Astrophys. 134, 1-6.