.help eqecl Jun99 "Slalib Package"
.nf

      SUBROUTINE slEQEC (DR, DD, DATE, DL, DB)

     - - - - - -
      E Q E C
     - - - - - -

  Transformation from J2000.0 equatorial coordinates to
  ecliptic coordinates (double precision)

  Given:
     DR,DD       dp      J2000.0 mean RA,Dec (radians)
     DATE        dp      TDB (loosely ET) as Modified Julian Date
                                              (JD-2400000.5)
  Returned:
     DL,DB       dp      ecliptic longitude and latitude
                         (mean of date, IAU 1980 theory, radians)

  Called:
     slDS2C, slPREC, slEPJ, slDMXV, slECMA, slDC2S,
     slDA2P, slDA1P

  P.T.Wallace   Starlink   March 1986

  Copyright (C) 1995 Rutherford Appleton Laboratory
  Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.

.fi
.endhelp