USNO-A2 Catalogue
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https://b2find.eudat.eu/dataset/aed3be22-ed06-5fde-a726-7ff7848c8379
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USNO-A2.0 is a catalog of 526,280,881 stars, and is based on a re-reduction of the Precision Measuring Machine (PMM) scans that were the basis for the USNO-A1.0 catalog. The...
USNO-A2.0是包含526,280,881颗恒星的星表，其基于对精密测量机（Precision Measuring Machine，PMM）扫描数据的二次归算，而该扫描数据正是USNO-A1.0星表的构建依据。The...
