Astronomy and Astrophysics – Astronomy
Scientific paper
May 1967
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967natur.214..900s&link_type=abstract
Nature, Volume 214, Issue 5091, pp. 900-901 (1967).
Astronomy and Astrophysics
Astronomy
6
Scientific paper
THE dynamical method of determining the astronomical unit is based on a relation between the astronomical unit A expressed in km and the ratio m of the mass of the Earth-Moon system to the solar mass. According to this relation m A3 equals a constant which is known with sufficient accuracy for all practical purposes. A derivation of this relation was recently given by Brouwer1. The effects of the attraction of the Earth-Moon system on bodies in close approaches permit the determination of m and thus of A. Various authors have tried to determine the mass of the Earth-Moon system from observations of the Minor Planet (433) Eros which comes near to the Earth. The first determination of this kind was performed by Witt2 and the most recent one was published by Rabe3. An independent determination of the astronomical unit became possible using radar echoes from Venus, but the radar result differs significantly from Rabe's result. Considerable effort was made by Eckstein4 and Marsden5 to reconcile the two differing values using numerical material previously published by Rabe.
Schubart Joachim
Zech Gabriele
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