Gravitational Inconsistency in the Lunar Theory: Confirmation by Radio Tracking

Science  24 May 1968:
Vol. 160, Issue 3830, pp. 875-876
DOI: 10.1126/science.160.3830.875


When range and Doppler observations of space probes near or on Moon are reduced by use of a lunar ephemeris calculated from the Brown lunar theory, residuals as large as 440 meters in position and 1.5 millimeters per second in velocity are observed. When the calculations are repeated with use of LE 5, the integrated lunar ephemeris described (1), the residuals are greatly reduced.