LIU Ci-yuan

(National Time Service Center, Chinese Academy of Sciences, Xi′an 710600, China)

Abstract: A comprehensive statistical analysis of the resources of literatures, catalogues and time distribution for the astronomical records of the Sui, Tang and Wudai are conducted. There are 1 509 records recorded in the 379 years, including 256 solar and lunar eclipses, 764 lunar and planetary positions and 489 others. Those records mainly come from the astronomical treatises of the official Histories and Tanghuiyao. Comparing to the records for the periods prior to or later than Sui Tang and Wudai, the astronomical records for this period are few and unevenly distributed

Key words: ancient astronomical record; history of astronomy; Sui Tang and Wudai; statistical analysis