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15.5.399 nut00a

nut00a, jdtt, dpsi, deps

[SOFA] Returns the nutation for TT Julian Date jdtt according to the IAU 2000A model (MHB2000 luni-solar and planetary nutation with free core nutation omitted). dpsi and deps are the returned nutation components (luni-solar + planetary) in radians with respect to the equinox and ecliptic of date. The J2000.0 obliquity is assumed to be the Lieske et al. (1977) value of 84381.448 arcsec. The output parameters get the same dimensions as jdtt.

See also: Astronomical Coordinate Calculations