New test of general relativity - Measurement of de Sitter geodetic precession rate for lunar perigee

Astronomy and Astrophysics – Astronomy

Scientific paper

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Earth-Moon System, Lunar Rangefinding, Precession, Relativity, Earth Rotation, Laser Range Finders, Perigees, Rates (Per Time), Very Long Base Interferometry, Moon, Motion, Celestial Mechanics, Geodesy, Dynamics, Laser Methods, Astronomy, Calculations, Interferometry, Vlbi, Gravity Properties

Scientific paper

According to general relativity, the calculated rate of motion of lunar perigee should include a contribution of 19.2 msec/yr from geodetic precession. The authors show that existing analyses of lunar-laser-ranging data confirm the general-relativistic rate for geodetic precession with respect to the planetary dynamical frame. In addition, the comparison of Earth-rotation results from lunar laser ranging and from very long-baseline interferometry (VLBI) shows that the relative drift of the planetary dynamical frame and the extragalactic VLBI reference frame is small. The estimated accuracy is about 10%.

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