Implications of the Revised Mars Radius

Details Implications of the Revised Mars Radius Implications of the Revised Mars Radius

Jul 1966

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966natur.211q.396b&link_type=abstract

Nature, Volume 211, Issue 5047, pp. 396 (1966).

Physics

4

Scientific paper

Kliore, Cain and Levy1, in an analysis of the trajectory of the Mariner IV vehicle across Mars in July 1965, have presented revised values for the radius of Mars. For the radii measured from the centre of mass, they give 3,384 +/- 3 km at the entrance occultation (50.5° S. lat.) and 3,379 +/- 4 km at the exit (60° N. lat.). These figures formally yield 3,392 km for the mean radius R, but give a rather greater value for the ellipticity of figure ɛ than the usual value (near 1/192) inferred from dynamical observations. If the usual value of ɛ is used the yielded value of R is nearer 3,388 km. If one accepts the authors' estimates of the observational uncertainties, it would therefore appear safe to assume that the observations yield 3,390 +/- 6 km.

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