FK5星表和依巴谷星表的比较

A COMPARISON BETWEEN THE FK5 AND HIPPARCOS CATALOGUES

由ＦＫ５星表和依巴谷星表在不同历元上的比较、检测和讨论了ＦＫ５星表的系统差．结果表明，ＦＫ５星表的自行系统差可能是影响ＦＫ５星表位置系统差的主要来源．在一些研究工作中，例如在依巴谷星表系统中研究地球自转的长期变化或以前的照相观测结果的重新归算。

Through a comparison between the FK5 and Hipparcos catalogues at different epochs,the systematic differences of FK5 are tested and discussed.This shows that the systematic differences in proper motions of FK5 seem to be the primary origin which affects the systematic differences in positions of FK5.In some researches on the secular variation of the Earth's rotation,the re reduction of old photographic plates in the Hipparcos system etc.,the influence of the individual errors of proper motions in the Hipparcos catalogue must be taken into cosideration.