A database on visual binaries is presented. It contains measurements on 12750 visual binaries with less than 2'' of separation or with large proper motion north of -10 degrees of declination. It contains also bibliographic references and published orbits for 851 stars. The SIDONIE database is implemented on the Web and allows astronomers to prepare new observations, find data to calculate new orbits or obtain statistical information on the stars in the database.
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Contel et al. (2001) studied this question.
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