Remove the e-terms (elliptic component of annual aberration) from a pre IAU 1976 catalogue RA,Dec to give a mean place. (double precision)
rc,dc double RA,Dec (radians) with e-terms included eq double Besselian epoch of mean equator and equinox
*rm,*dm double RA,Dec (radians) without e-terms
slaEtrms, slaDcs2c, sla,dvdv, slaDcc2s, slaDranrm
Most star positions from pre-1984 optical catalogues (or derived from astrometry using such stars) embody the e-terms. This routine converts such a position to a formal mean place (allowing, for example, comparison with a pulsar timing position).
Explanatory Supplement to the Astronomical Ephemeris, section 2D, page 48. P.T.Wallace Starlink 31 October 1993