정조대의 曆法과 術數學 지식: 『千歲曆』과 『協吉通義』를 중심으로

Abstract

In this paper, I examined the context of the publication of two books, Ch’ŏnseryŏk (Millenium Calendar) and the Hyŏpkilt’ongŭi (General Meaning of Selection) in King Chŏngjo period(1777~1800), which are, respectively, related to the caledrical astronomy and shushu knowledge. Shushu and calendrical astronomy were originally linked with each other. Four kinds of time units, year, month, date, and hour, were seriously concerned with in taking the auspices, and they were deployed by the astronomical method of calendar making. From the seventeenth century when western calendar adopted in Chosŏn kingdom, Korea has sought for a deeper understanding of western astronomy and became to be equiped with suitable calendar making skills applying western astronomy in the mid-eighteenth century. The publication of Ch’ŏnseryŏk in King Chŏngjo period shows that Korea has reached the complete understanding of western astronomy and succeeded in calculating long term calendar of one hundred year future. The Hyŏpkilt’ongŭi, a compendium on hour and date selection, employed a new Korean time standard compiled by the observation of seasonal culminating star and the cross-check with the calculation. In King Chŏngjo period, Korea was equipped with the best astronomical understanding and calendar making skill, and this made it possible to build a new shushu text with Korean time standard.