Experimental test of the variability of G using Viking lander ranging data

Details Experimental test of the variability of G using Viking lander ranging data Experimental test of the variability of G using Viking lander ranging data

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phrvl..51.1609h&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 51, Oct. 31, 1983, p. 1609-1612. NASA-supported research.

Astronomy and Astrophysics

Astronomy

170

Astrometry, Gravitational Constant, Mars (Planet), Planetary Orbits, Viking Lander Spacecraft, Asteroids, Atomic Clocks, Newton Theory, Solar System

Scientific paper

Results are presented from the analysis of solar-system astrometric data, notably the range data to the Viking landers on Mars. A least-squares fit of the parameters of the solar system model to these data limits a simple time variation in the effective Newtonian gravitational constant to (2 + or - 4) x 10 to the -12th/yr and a rate of drift of atomic clocks relative to the implicit clock of relativistic dynamics to (1 + or - 8) x 10 to the -12th/yr. The error limits quoted are the result of uncertainties in the masses of the asteroids.

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