The AC2000 Catalogue
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The Astrographic Catalogue (AC) was an international effort designed to photograph and measure the positions of all stars brighter than magnitude 11.0. In total, some 4.6...
天体照相星表（Astrographic Catalogue, AC）是一项旨在拍摄并测量所有亮度亮于11.0等的恒星位置的国际合作项目。总计约有4.6……
