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Published online by Cambridge University Press: 07 August 2017
A total of 53,259 observations(26,793 in declination and 26,466 in right ascension) of the Sun, Mercury and Venus made with the Washington, six-inch and nine-inch transit circles from 1911 to 1971 and the Cape of Good Hope reversible transit circle from 1907 to 1959 are used to obtain equator and equinox solutions.