... consanguineous ring structure 同族环形山构造 constant of aberration 光行差常数 constant of nutation 章动常数 ...
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Using the data obtained during this period, the problems of determining the systematic error of FK_4 catalog and improving the constant of aberration are investigated.
利用这个期间的资料，初步研究了FK_4星表的系统误差和改进光行差常数等问题。
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