Corrections and new developments in rigidEarth nutation theory. II. Influence of secondorder geopotential and direct planetary effect.
Abstract
In a recent paper, Souchay & Kinoshita (1996A&A...312.1017S) recalculated the coefficients of the nutation for a rigidEarth model due to the main lunisolar potential (coming from J_2_), with respect to the values given by Kinoshita & Souchay (1990CeMDA..48..187K), by taking into account an updated value of the general precession in longitude. In the following we complete this study by computing the coefficients coming from the lunar influence on the secondorder geopotential (J_3_, C_2,2_, S_2,2_, J_4_) and those coming from the direct torque exerted by the planets. We notice some corrections to be done with respect to the tables of Kinoshita & Souchay(1990CeMDA..48..187K), and we show that the agreement with computations done by Hartmann et al. (1995, submitted) for the J_3_ part and Williams (1995AJ....110.1420W) for the direct planetary effect is remarkable, although the way of calculation is quite different.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 February 1997
 Bibcode:
 1997A&A...318..639S
 Keywords:

 REFERENCE SYSTEMS;
 EARTH;
 CELESTIAL MECHANICS