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.help addet Jun99 "Slalib Package"
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SUBROUTINE slADET (RM, DM, EQ, RC, DC)
- - - - - -
A D E T
- - - - - -
Add the E-terms (elliptic component of annual aberration)
to a pre IAU 1976 mean place to conform to the old
catalogue convention (double precision)
Given:
RM,DM dp RA,Dec (radians) without E-terms
EQ dp Besselian epoch of mean equator and equinox
Returned:
RC,DC dp RA,Dec (radians) with E-terms included
Note:
Most star positions from pre-1984 optical catalogues (or
derived from astrometry using such stars) embody the
E-terms. If it is necessary to convert a formal mean
place (for example a pulsar timing position) to one
consistent with such a star catalogue, then the RA,Dec
should be adjusted using this routine.
Reference:
Explanatory Supplement to the Astronomical Ephemeris,
section 2D, page 48.
Called: slETRM, slDS2C, slDC2S, slDA2P, slDA1P
P.T.Wallace Starlink 18 March 1999
Copyright (C) 1999 Rutherford Appleton Laboratory
Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.
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