caa a22 4500 606223959 CHVBK 20210128101141.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00407-014-0146-4 doi (NATIONALLICENCE)springer-10.1007/s00407-014-0146-4 Guan Yuzhen Department of Egyptology and Assyriology, Brown University, 2 Prospect Street, Box 1899, 02912, Providence, RI, USA aut Eclipse theory in the Jing chu li: Part I. The adoption of lunar velocity [Elektronische Daten] [Yuzhen Guan] This paper investigates the methods of eclipse prediction in China before the fourth century AD, with a detailed example of the eclipse theory in the Jing chu li (Luminous Inception System ). As the official calendar of the Jin dynasty and the Kingdom Wei during the three kingdoms period, the Jing chu li was used for more than 200years after it was adopted in 237 AD. From the San tong li (Triple Concordance System ) of the Western Han to the Jing chu li, methods for predicting eclipses developed in three important ways: (i) from predicting only lunar eclipses to the prediction of both solar and lunar eclipses; (ii) from relying only on the mean periods of the sun and the moon to taking into consideration the variation in lunar velocity; and (iii) from estimating only a rough date to predicting the exact time of eclipses. This paper addresses two questions: first, how did ancient Chinese astronomers use cycles to predict eclipses in the Han dynasty? Second, how did astronomers such as Liu Hong and Yang Wei revise early eclipse prediction methods? The original text of the Jing chu li is analyzed to show how Yang Wei combined lunar velocity theory with the traditional method of predicting eclipses using cycles. Springer-Verlag Berlin Heidelberg, 2014 Archive for History of Exact Sciences Springer Berlin Heidelberg 69/1(2015-01-01), 103-123 0003-9519 69:1<103 2015 69 407 https://doi.org/10.1007/s00407-014-0146-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00407-014-0146-4 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Guan Yuzhen Department of Egyptology and Assyriology, Brown University, 2 Prospect Street, Box 1899, 02912, Providence, RI, USA aut NATIONALLICENCE 773 0- Archive for History of Exact Sciences Springer Berlin Heidelberg 69/1(2015-01-01), 103-123 0003-9519 69:1<103 2015 69 407