SIDONIE: A gateway for visual double stars studies A database on visual binaries is presented. It contains measurements on12750 visual binaries with less than 2'' of separation or with largeproper motion north of -10 degrees of declination. It contains alsobibliographic references and published orbits for 851 stars. The SIDONIEdatabase is implemented on the Web and allows astronomers to prepare newobservations, find data to calculate new orbits or obtain statisticalinformation on the stars in the database.
Mesures et decouvertes d'etoiles doubles effectuees a la lunette de 50cm de l'Observatoire de Nice. Measures and discoveries of visual double stars made with the 50cm refractor at the Nice Observatory. Measures and discoveries of visual double stars made at the Observatoirede la Cote d'Azur at Nice, between 1988 and 1994, with the 50cmrefractor equipped with a filar micrometer and electronic recordingdevice. The programs proposed by J. Dommanget involve the complement ofthe C.C.D.M. (resolving problems of identification of double stars andof coherency in the Index) and the INput CAtalog Hipparcos (resolutionof ambiguities on the binarity and on the position of certain doublestars which have seldom or never been observed again from the epoch ortheir discovery). The author has discovered three new binaries: JCT1,JCT2 and JCT3.
