Abstract
The importance of early Korean records of supernovae, comets, meteors and aurorae in modern astronomy is well-known. However, the most extensive Korean source of such data, the Seungjeongwon Ilgi (Daily records of the Office of Royal Secretariat), has received relatively little attention among historians of astronomy. Written in Chinese (Hanmun), the Seungjeongwon Ilgi is a day-to-day chronicle of important events. The main emphasis is on matters of court and state, but observations of a wide variety of astronomical phenomena are regularly included. Although maintenance of the chronicle began early in the Joseon Dynasty (AD 1392–1910), due to wars and rebellions only the records from AD 1623 to 1894 now survive. Nevertheless, the remaining text is substantial, containing more than 3,000 chapters. In this paper, the general format of the astronomical records in the Seungjeongwon Ilgi is discussed, together with examples of the various types of celestial observations which this huge compilation contains.
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