Second Greenwich Catalog of Stars for 1925.0

The observations for these two catalogs were made with the transit circle at the Royal Observatory in Greenwich, England, between the years 1922 and 1930 under the direction of...这两个星表的观测工作，于1922年至1930年间在英国格林威治皇家天文台（Royal Observatory, Greenwich）借助子午环（transit circle）完成，相关观测由...主持进行。