USNO-A2.0星表
收藏国家地球系统科学数据中心2017-07-18 更新2024-03-04 收录
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https://www.geodata.cn/data/datadetails.html?dataguid=3699372200814&docId=27155
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资源简介：
USNO-A2.0 is a catalog of 526,280,881 stars, and is based on a
re-reduction of the Precision Measuring Machine (PMM) scans that were
the basis for the USNO-A1.0 catalog. The major difference between A2.0
and A1.0 is that A1.0 used the Guide Star Catalog (Lasker et al. 1986,
see Cat. I/220) as its reference frame whereas A2.0 uses the ICRF as
realized by the USNO ACT catalog (Urban et al. 1997, see Cat.
II/246>).
提供机构：
中国科学院国家天文台
创建时间：
2017-07-18
