地面星表系统相对于Hipparcos系统的旋转

• 作者: 朱紫
• 来源期刊: 中国学术期刊文摘
• 关键词: 天体测量 星表 参考系 惯性系
• 年，卷（期）: 2000,（8）
• 页码范围: 997-1000
• 页数: 4页
• 语种: 中文

摘要

Analyzing the FK5 proper motions via two large ground-based astrographic catalogues, the PPM and ACRS catalogues, an overall pattern comparison of the FK5 proper-motion system with Hipparcos was carried out. The global rotation (time dependent) between two reference systems is found to be remarkably large, even if the precessional correction and the correction of the fictitious motion of the equinox have been taken into account. Comparing Hipparcos proper motions with those of the SPM 2.0 Catalog, which provides absolute proper motions of objects measured directly relative to external galaxies, the global rotation with respect to the Hipparcos system is obtained to be slower than 0.25 mas/y except the component along the y-axis.