摘要
依巴谷星表在建立时已做到与以河外射电源定义的国际天球参考系（ICRS）相符合，而ICRS系统与由FKS星表实现的由J2000．0平赤道和平春分点定义的赤道坐标系统相一致。估计依巴谷里表的系统误差小于0．1mas，因此，依巴谷里表成为描述光学观测确定的地球定向参数（EOP）的一个更为均匀的参考系。本文主要讨论了FK5和依巴谷星表之间的星表系统差（FK5－Hip），并用中国光电等高星表来检验（FK5－Hip）星表系统差的结果，并估算了星表系统差（FK5－Hip）对EOP的影响。
The Hipparcos catalogue has been constructed in such a way that its reference frame coincides with the International Celestial Reference System (ICRS), which is consistent with the equatoral system for the mean equinox and equator of J2000.0, previously realised by the FK5 catalogue. The systematic errors of Hipparcos catalogue are estimated to be below one or two tenths of a milliarcsec. Therefore the Hipparcos catalogue is a more homogeneous system which can be used to ameliorate the Earth orientation parameters (EOP) determined with the optical observations. In this paper the systematic differences (FK5-Hip) checked against with the system of the Chinese photoelectric astrolabe catalogues are discussed; the effects of the systematic differences (FK5-Hip) for the EOP are also estimated.
出处
《中国科学院上海天文台年刊》
1998年第19期46-50,共5页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
