An improved value of the lunar moment of inertia

Details An improved value of the lunar moment of inertia An improved value of the lunar moment of inertia

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1699b&link_type=abstract

Journal of Geophysical Research, vol. 82, Apr. 10, 1977, p. 1699-1701.

Physics

12

Lunar Gravitation, Moments Of Inertia, Orbit Perturbation, Satellite Orbits, Explorer 35 Satellite, Explorer 49 Satellite, Long Term Effects, Satellite Observation

Scientific paper

The lunar gravitational research reported on by Gapcynski et al., (1975) has been extended to include an additional 600 days of the time variation of ascending node for the Explorer 49 spacecraft. Analysis of these additional data resulted in an improved value of the second-degree zonal harmonic coefficient C(20) = (-2.0219 equal to 0.0091) times 10 to the minus 4. This value of C(20) used in conjunction with the parameters beta equal to libration (631.27 + or - 0.03) times 10 to the minus 6 and gamma to (227.7 + or - 0.7) times 10 to the minus 6 yields a more accurate definition of the lunar moment of inertia ratio equal to 0.391 + or - 0.002.

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