T. Hartmann et M. Soffel, THE NUTATION OF A RIGID EARTH MODEL - DIRECT INFLUENCES OF THE PLANETS, The Astronomical journal, 108(3), 1994, pp. 1115-1120
This paper presents the nutation of the rigid earth due to the direct
influence of the planets, which can reach up to 0.5 milliarcsec (mas)
in longitude and 0.2 mas in obliquity. In contrast to the direct compu
tation method of Kinoshita and Souchay [Celest. Mech., 48, 137 (1990)]
, it is here calculated indirectly via the new planetary tidal potenti
al development recently given by Hartmann and Wenzel [Bull. d'Inform.
Marees Terrest., 119, 8847 (1994a)]. The results are (except for two t
erms) equal within the stated truncation threshold of 0.005 mas. Since
we lowered this level to 0.0025 mas, another eleven terms are added.
Values for the precession due to the planets are also deduced from the
tidal potential.