PPMXL星表
收藏国家地球系统科学数据中心2017-07-17 更新2024-03-04 收录
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https://www.geodata.cn/data/datadetails.html?dataguid=118048508170757&docId=27277
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资源简介：
USNO-B1.0 (Cat. I/284) and 2MASS (Cat. II/246) are the most widely
used full-sky surveys. However, 2MASS has no proper motions at all,
and USNO-B1.0 published only relative, not absolute (i.e. on ICRS)
proper motions. We performed a new determination of mean positions and
proper motions on the ICRS system by combining USNO-B1.0 and 2MASS
astrometry.
提供机构：
中国科学院国家天文台创建时间：
2017-07-17
