In this paper, we study the lunar eclipse records in the Goryeosa (History of the Goryeo Dynasty), an official history book of the Goryeo dynasty (A.D. 918 - 1392). In the history book, a total of 228 lunar eclipse accounts are recorded, covering the period from 1009 to 1392. However, we find that t...
In this paper, we study the lunar eclipse records in the Goryeosa (History of the Goryeo Dynasty), an official history book of the Goryeo dynasty (A.D. 918 - 1392). In the history book, a total of 228 lunar eclipse accounts are recorded, covering the period from 1009 to 1392. However, we find that two accounts are duplications and four accounts correspond to no known lunar eclipses around the dates. For the remaining lunar eclipses, we calculate the magnitude and the time of the eclipse at different phases using the DE406 ephemeris. Of the 222 lunar eclipse accounts, we find that the minimum penumbral magnitude was 0.5583. For eclipses which occurred after midnight, we find that some accounts were recorded on the day before the eclipse, like the astronomical records of the Joseonwangjosillok (Annals of the Joseon Dynasty), while others were on the day of the lunar eclipse. We also find that four accounts show a difference in the Julian dates between this study and that of Ahn et al., even though it is assumed that the Goryeo court did not change the dates in the accounts for lunar eclipses that occurred after midnight. With regard to the contents of the lunar eclipse accounts, we confirm that the accounts recorded as total eclipses are accurate, except for two accounts. However, both eclipses were very close to the total eclipse. We also confirm that all predicted lunar eclipses did occur, although one eclipse happened two days after the predicted date. In conclusion, we believe that this study is very helpful for investigating the lunar eclipse accounts of other periods in Korea, and furthermore, useful for verifying the calendar dates of the Goryeo dynasty.
In this paper, we study the lunar eclipse records in the Goryeosa (History of the Goryeo Dynasty), an official history book of the Goryeo dynasty (A.D. 918 - 1392). In the history book, a total of 228 lunar eclipse accounts are recorded, covering the period from 1009 to 1392. However, we find that two accounts are duplications and four accounts correspond to no known lunar eclipses around the dates. For the remaining lunar eclipses, we calculate the magnitude and the time of the eclipse at different phases using the DE406 ephemeris. Of the 222 lunar eclipse accounts, we find that the minimum penumbral magnitude was 0.5583. For eclipses which occurred after midnight, we find that some accounts were recorded on the day before the eclipse, like the astronomical records of the Joseonwangjosillok (Annals of the Joseon Dynasty), while others were on the day of the lunar eclipse. We also find that four accounts show a difference in the Julian dates between this study and that of Ahn et al., even though it is assumed that the Goryeo court did not change the dates in the accounts for lunar eclipses that occurred after midnight. With regard to the contents of the lunar eclipse accounts, we confirm that the accounts recorded as total eclipses are accurate, except for two accounts. However, both eclipses were very close to the total eclipse. We also confirm that all predicted lunar eclipses did occur, although one eclipse happened two days after the predicted date. In conclusion, we believe that this study is very helpful for investigating the lunar eclipse accounts of other periods in Korea, and furthermore, useful for verifying the calendar dates of the Goryeo dynasty.
In this study, we analyze the the lunar eclipse accounts recorded in the Goryeosa based on modern astrodynamic calculations. This paper is organized as follows.
성능/효과
First, we found that a Goryeo astronomer could recognize a lunar eclipse phenomenon provided that the eclipse had a magnitude brighter than 0.5583 in the penumbral phase
In conclusion, we believe that this study is very helpful for understanding the astronomical records of the Goryeo dynasty, particularly the lunar eclipse records
Third, we confirmed that all predicted lunar eclipses in the accounts actually occurred, except for one eclipse on 1030 February 19
후속연구
For further work, however, we suggest that more studies are needed on the accounts that exhibit a difference in the Julian dates derived from this study as compared with previous ones.
참고문헌 (19)
Ahn, S.-H., & Park, J.W. 2004, AtWhat Time a Day Begins in the Korean History?, JASS, 21, 505
Ahn, Y. S., Han, B. S., Sim, K. J., & Song, D. J. 2009a, Conversion Table between the Lunisolar Calendar and the Gregorian Calendar in the Joseon Dynasty (Seoul: Korean Studies Information Co. Ltd.)
Ahn, Y. S., Sim, K. J., Song, D. J., Han, B. S., & Yang, H. J. 2009b, Conversion Table between the Lunisolar Calendar and the Gregorian Calendar in the Goryeo Dynasty (Seoul: Korean Studies Information Co. Ltd.)
Bretagnon, P., & Francou, C. 1988, Planetary Theories in Rectangular and Spherical Variables. VSOP 87 Solutions, A&A, 202, 309
Chapront-Touzé, M., & Chapront, J. 1983, The Lunar Ephemeris ELP 2000, A&A, 124, 50
Danjon, A. 1951, Les éclipse de Lune par la pénombre en 1951, LAstr, 65, 51
Han, B. S. 1998, Conversion Table between the Lunisolar Calendar and the Gregorian Calendar in Korea (Gyeongsan: Yeungnam University Press)
Han, B. S. 2001, Conversion Table between the Lunisolar Calendar and the Gregorian Calendar in Korea: Volume 2, 917 – 2050 (Gyeongsan: Yeungnam University Press)
Hung, C.-F. 2004, A Sino-Western Calendar for the Five Dynasties Liao-Sung-Hsia-Chin-Yüan A.D. 900-1400 (Taipei: Institute of History and Philology, Academica Sinica)
Lee, K.-W., Ahn, Y. S., & Mihn, B.-H. 2012a, Verification of the Calendar Days of the Joseon Dynasty, JKAS, 45, 85
Lee, K.-W., Ahn, Y. S., & Yang, H. J. 2012b, Study on the System of Night Hours for Decoding Korean Astronomical Records of 1625-1787, AdSpR, 48, 592
Liu, B.-L., & Fiala, A. D. 1992, Cannon of Lunar Eclipses 1500 B.C. - A.D. 3000 (Richmond: Willmann-Bell, Inc.)
Meeus, J. 1998, Astronomical Algorithms (Richmond: Willmann-Bell, Inc.)
Morrison, L. V., & Stephenson, F. R. 2004, Historical Values of the Earth’s Clock Error ΔT and the Calculation of Eclipses, JHA, 35, 327
Press, W. H., Flannery, B. P., Teukolsky, S. A., & Vetterling, W. T. 1992, Numerical Recipes in Fortran (Cambridge: Cambridge University Press)
Stephenson, F. R. 2007, Variations in the Earth’s Clock Error ΔT between AD 300 and 800 as Deduced from Observations of Solar and Lunar Eclipses, JAHH, 10, 211
Stephenson, F. R. 2008, Historical Eclipses and Earth's Rotation (Cambridge: Cambridge University Press)
Standish, E. M., Newhall, X. X., Williams, J. G., & Folkner, W. F. 1997, JPL Planetary and Lunar Ephemeris (CD-ROM) (Richmond: Willmann-Bell, Inc.)
Urban, S. E., & Seidelmann, P. K. 2013, Explanatory Supplement to the Astronomical Almanac (Mill Valley: University Science Books)
이 논문을 인용한 문헌
저자의 다른 논문 :
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
활용도 분석정보
상세보기
다운로드
내보내기
활용도 Top5 논문
해당 논문의 주제분야에서 활용도가 높은 상위 5개 콘텐츠를 보여줍니다. 더보기 버튼을 클릭하시면 더 많은 관련자료를 살펴볼 수 있습니다.
AI-Helper
※ AI-Helper는 부적절한 답변을 할 수 있습니다.