A. V. Kuz'min

Completion of the Sternberg Astronomical Institute Astrographic Catalogue Project

The first astronomical photographic survey, the Carte du Ciel was initiated in 1887 by a group of French astronomers. The observational campaign was started in 1891, while the last of more than 22,000 total plates were photographed in 1950; most of observations (more than 90%) were performed prior to 1920. Detailed description of the Carte du Ciel development can be found elsewhere (Kolchinsky 1989, Eichhorn 1974, Debarbat et al. 1987).

Guide Star Catalog Revisited - The Determination of Proper Motions

We are compiling a catalogue of positions and proper motions of 4 million stars, based on the Guide Star Catalogue (GSC) and the Astrographic Catalogue (AC). The GSC is re-reduced by a method described in this paper. The AC has been newly reduced recently by us for the determination of positions and proper motions of the PPM catalogue. The expected accuracy of the proper motions of the GSC-AC catalogue ranges between 5 and 6 mas/year. Having an average star density of 100 per square degree, this catalogue will be a useful tool for the reduction of CCD frames.