Space measurements of the gravitational constant using an artificial binary

Details Space measurements of the gravitational constant using an artificial binary Space measurements of the gravitational constant using an artificial binary

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92..986h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 92, Oct. 1986, p. 986-988.

Astronomy and Astrophysics

Astronomy

8

Baryons, Gravimetry, Gravitational Constant, Spaceborne Experiments, Earth Tides, Error Analysis, Orbital Mechanics

Scientific paper

The gravitational constant G can be measured to more than two orders of magnitude higher accuracy in space by finding the orbital period of an artificial binary composed of two self-gravitating objects of known mass and semimajor axis than is possible by traditional laboratory techniques. Such a binary would have to be placed in high Earth orbit, preferably at the Lagrangian L4 or L5 points or higher, to minimize the tidal effect of the Earth. In the absence of the recently proposed fifth force of nature, a definitive measurement of G can be made at modest cost by using a binary composed of low-mass tungsten balls in a near-contact orbit with a semimajor axis of a few centimeters. If the fifth force exists, some modifications of the experiment must be regarded.

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