slaEqecl -

SYNOPSYS

PARAMETERS

double dr

double dd

double date

double *dl

double *db

DESCRIPTION

  Transformation from J2000.0 equatorial coordinates to
  ecliptic coordinates.

  (double precision)

Given

     dr,dd       double      J2000.0 mean RA,Dec (radians)
     date        double      TDB (loosely ET) as Modified Julian Date
                                              (JD-2400000.5)

Returned

     *dl,*db     double      ecliptic longitude and latitude
                             (mean of date, IAU 1980 theory, radians)

Called

     slaDcs2c, slaPrec, slaEpj, slaDmxv, slaEcmat, slaDcc2s,
     slaDranrm, slaDrange


  P.T.Wallace   Starlink   31 October 1993

SEE ALSO

• slalib.3