Research Article
An Analysis of the Stars Recorded in Seonggyeong: Comparison with the Star Catalogue in Yixiang kaocheng xubian
Institute for Basic Sciences, Chungbuk National University
Published: April 2017 · Vol. 39 No. 1 · pp. 125-194
DOI: https://doi.org/10.36092/KJHS.2017.39.1.125
Full Text
Abstract
In the late Joseon period, an astronomical text titled Seonggyeong 星鏡 (Stars Reflected in the Mirror) was published by Nam Byeong-Gil 南秉吉 (1820-1869). This study aims to critically review the identification of stars in Seonggyeong by previous scholars, and to re-identify them by considering its relationship with the star catalogue of Yixiang kaocheng xubian 儀象考成續編. In doing so, new methods, including overlap analysis and pattern analysis, are applied. Of the 1,449 stars recorded in Seonggyeong, this paper identifies 1,413 stars (97.5 percent). The positional error of the identified stars is 5.33±0.34 arc-min. This study also confirms that the magnitudes of the recorded stars have correlations with those of modern times. It is determined that the positional errors of the stars grow larger as the magnitude of the stars become dimmer, or as the position of the stars come closer to the pole. Based on these analyses, this paper finally suggests that Seonggyeong was compiled through selecting the East Asian traditional stars recorded in the star catalogue of Yixiang kaocheng xubian, while at the same time completely correcting the precession.