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Published online by Cambridge University Press: 04 August 2017
The first two catalogues produced from test observations made with the Carlsberg Automatic Transit Circle (CATC) at the Copenhagen University Observatory in the period 1981/83 have internal mean errors of 0″.21 in right ascension and 0″.22 in declination. In 1983 the CATC was moved to the international Observatorio del Roque de los Muchachos where it will begin a programme of differential and fundamental astrometry in 1984.