摘要
利用上海天文台佘山40cm折射望远镜拍摄的历元间隔约为27年的6张底片，共计有14次露光观测，以PPM星表作为初始参考星表，按中心重叠法进行归算，得到了南天区域内21颗恒星的高精度位置和自行，其中有6颗是依巴谷垦，它们的赤经和赤纬精度的平均值分别为1．8ms和22mas，赤经自行和赤纬自行精度的平均值分别达0．068ms／a和0．97mas／a。
Fourteen exposures on 6 plates of the epoch differences up to 27 years, which were taken with the 40cm astrographic refractor at Sheshan station of Shanghai Astronomical Observatory, were reduced. Taking the PPM catalogue as the initial reference catalogue and using the central overlapping method with the iteration process, we obtained high - precision positions and proper motions of 21 stars in an area of the southern sky. There are 6 Hipparcos stars among the 21 stars, the mean internal errors of them in right ascension and declination are 1. 8ms and 22mas, respectively, and the mean internal errors of proper motions of them in right ascension and declination are 0. 068ms/a and 0. 97mas/a, respectively.
出处
《中国科学院上海天文台年刊》
1998年第19期40-45,共6页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
