摘要
利用佘山40 cm折射望远镜拍摄的BD+70°68、BD+63°869和BD+2°348三颗星的底片进行了视差解算。根据归算所得结果,对如何提高恒星三角视差测定值的精度和有关观测、测量、归算中的一些具体问题进行了分析和讨论,这些问题包括观测历元的安排、时角的限制、露光量的掌握、参考星的选择,归算模型的确定等。并且,本文还初步估计了上海天文台1.56 m反射望远镜测定恒星三角视差可能达到的外部精度。
Based on the determination of parallaxes of the stars BD+70°68, BD+63°869 and BD + 2°348 with plates which were taken with 40 cm refractor at Z6-Se, some problems, such as time intervel of observations, limitation to the models of plate constants, and choice of reference stars, are analyzed and discussed in some detail. The results and con-clusions obtained from the discussions are constructive for improving the accuracy of determination of stellar trigonometric parallaxes, including how to reasonably take and measure plates, and how to properly reducing the measurements to get accurate parallaxes. Consi-dering all these, we expect that there is no problem for the new-built 1.56 m astrometric reflector at Shanghai Observatory to be used to achieve the accuracy of ±0'004 for determination of stellar trigonometric parallaxes.
出处
《中国科学院上海天文台年刊》
1990年第11期74-79,共6页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
