Impact of the Quadrupole Moment of the Sun on the Dynamics of the Earth-Moon System

Details Impact of the Quadrupole Moment of the Sun on the Dynamics of the Earth-Moon System Impact of the Quadrupole Moment of the Sun on the Dynamics of the Earth-Moon System

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cemda..73..329b&link_type=abstract

Celestial Mechanics and Dynamical Astronomy, v. 73, Issue 1/4, p. 329-338 (1999).

Astronomy and Astrophysics

Astronomy

7

Sun, Quadrupole, Moon, Libration, Earth, Llr Data

Scientific paper

Range of values of the Sun's mass quadrupole moment of coefficient J2 arising both from experimental and theoretical determinations enlarge across literature on two orders of magnitude, from around 10-7 until to 10-5. The accurate knowledge of the Moon's physical librations, for which the Lunar Laser Ranging data reach an outstanding precision level, prove to be appropriate to reduce the interval of J2 values by giving an upper bound of J2. A solar quadrupole moment as high as 1.1 10-5 given either from the upper bounds of the error bars of the observations, or from the Roche's theory, is not compatible with the knowledge of the lunar librations accurately modeled and observed with the LLR experiment. The suitable values of J2 have to be smaller than 3.0 10-6.

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