Description:
Transform from J2000.0 equatorial coordinates to ecliptic coordinates.
Invocation
void palEqecl( double dr, double dd, double date, double
dl, double
db);
Arguments
dr = double (Given)
J2000.0 mean RA (radians)
dd = double (Given)
J2000.0 mean
Dec (Radians)
date = double (Given)
TT as Modified Julian Date (JD-2400000.5). The difference
between TT and TDB is of the order of a millisecond or two (i.e. about 0.02 arc-seconds).
dl = double
(Returned)
Ecliptic longitude (mean of date, IAU 1980 theory, radians)
db = double
(Returned)
Ecliptic latitude (mean of date, IAU 1980 theory, radians)
Copyright © 2012 Science and Technology Facilities Council.
Copyright © 2014 Cornell University.
Copyright © 2015 Tim Jenness