Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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OBSERVING SITES FOR THE CENTRAL SOLAR ECLIPSES IN ANCIENT CHINESE HISTORY

  • Ahn, Sang-Hyeon (Center for Theoretical Astronomy, Korea Astronomy and Space Science Institute)
  • Received : 2020.09.25
  • Accepted : 2020.11.06
  • Published : 2020.12.31
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Abstract

We determine the observing sites for eclipses of large magnitude recorded in ancient Chinese chronicles from 200 BCE to 900 CE, by adopting the difference between terrestrial time and universal time, ΔT, given by Morrison & Stephenson (2004). The records of solar eclipses with large magnitude are divided into four groups in accordance with the historical variations of the capital cities of ancient Chinese dynasties. We determine areas in which all the eclipses in each group, with an eclipse magnitude larger than a certain threshold value, could be observed. We find that these areas coincide with the historical capitals, which agrees with the general idea that the solar eclipses were observed at the capital of each dynasty. This result also verifies the ΔT values during the period from 100 BCE to 400 CE, during which historical records of eclipses are so rare that the ΔT values can only be obtained by interpolating the long-term data. Moreover, we show that the eclipses described by the term Ji in East-Asian history are not all total eclipses; their mean magnitude is 0.96 ± 0.04. We find that complementary expressions, such as dark daytime and appearance of stars during the eclipse, strengthen the possibility that eclipses described by the term Ji were total. We also provide quantitative definitions for expressions such as 'being not complete and like a hook', 'being almost complete', 'visibility of stars during the eclipse', and 'darkness during an eclipse.' The literal meanings of these expressions are in agreement with the recent physical modeling of sky brightness during total eclipses provided by Können & Hinz (2008).

Keywords

Acknowledgement

This work is supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF-2018R1D1A1B07050035).

References

  1. Ahn S.-H. & Park J.-W. 2004, At What Time a Day Begins in the Korean History?, JASS, 21, 505
  2. Ahn S.-H. 2008, Meaning of Ji (Exhausted) Eclipses in Ancient Calendrical Methods, PKAS, 23, 65
  3. Beijing Observatory 1988, A Union Table of Ancient Chinese Records of Celestial Phenomena (Zhangxu, China: Zhangxu Sci. Tech. Publisher)
  4. Bretagnon, P., & Francou, G. 1988, Planetary Theories in Rectangular and Spherical Variables: VSOP87 Solution, A&A, 202, 309
  5. Chapront-Touze, M., & Chapront, J. 1983, The Lunar Ephemeris ELP 2000, A&A, 124, 50
  6. Chapront-Touze, M., & Chapront, J. 1988, ELP 2000-85: A Semi-analytical Lunar Ephemeris Adequate for Historical Times, A&A, 190, 342
  7. Chapront-Touze, M., & Chapront, J. 1991, Lunar Tables and Programs from 4000 B.C. to A.D. 8000 (Richmond: Willmann-Bell, Inc.)
  8. Chapront, J., Chapront-Touze, M., & Francou, G. 1998, Introduction dans ELP 2000-82B de nouvilles valeurs des paramètres orbitaux de la Lune et du barycentre Terre-Lune (Paris: Observatoire de Paris)
  9. Chapront, J., Chapront-Touze, M., & Francou, G. 2002, A New Determination of Lunar Orbital Parameters, Precession Constant and Tidal Acceleration from LLR Measurements, A&A, 387, 700 https://doi.org/10.1051/0004-6361:20020420
  10. Espenak, F., & Meeus, J. 2006, Five Millennium Canon of Solar Eclipses: -1999 to +3000 (2000 BCE to 3000 CE), NASA TP-2006-214141 (Greenbelt, Maryland: NASA Goddard Space Flight Center)
  11. Konnen, G. & Hinz, C. 2008, Visibility of Stars, Halos, and Rainbows during Solar Eclipses, Appl. Opt., 47, 14 https://doi.org/10.1364/AO.47.000H14
  12. Lieske, K. 1987, Galilean Satellite Evolution - Observational Evidence for Secular Changes in Mean Motions, A&A, 176, 146
  13. Meeus, J. 1998a, The Effect of Delta T on Astronomical Calculations, J. Brit. Astron. Assoc., 108, 154
  14. Meeus, J. 1998b, Astronomical Algorithms, 2nd ed. (Richmond: Willmann-Bell)
  15. Morrison, L. V., & Stephenson, F. R. 2001, Historical Eclipses and the Variability of the Earth's Rotation, J. Geodyn., 32, 247 https://doi.org/10.1016/S0264-3707(01)00024-2
  16. Morrison, L. V. & Stephenson, F. R. 2004, Historical Values of the Earth's Clock Error ΔT and the Calculation of Eclipses, J. Hist. Astron., 35, 327 https://doi.org/10.1177/002182860403500305
  17. Morrison, L. V. & Stephenson, F. R. 2005, Addendum: Historical Values of the Earth's Clock Error, J. Hist. Astron., 36, 339 https://doi.org/10.1177/002182860503600307
  18. Nawar, S. 1983, Solar Activity and Atmospheric Attenuation Effects on the Visibility of Stars and Planets during Twilight, Moon & Planets, 29, 107 https://doi.org/10.1007/BF00928319
  19. Nawar, S., Morcos, A. B., & Mikhail, J. S. 2007, Photoelectric Study of the Sky Brightness along Sun's Meridian during the March 29, 2006 Solar Eclipse, New Astron., 12, 562 https://doi.org/10.1016/j.newast.2007.03.004
  20. Pankenier, D. W. 2012, On the Reliability of Han Dynasty Solar Eclipse Records, J. Astron. Hist. Herit., 15, 200
  21. Park, C. & La, D. 1994, Confirmation and Historical Consequences of Astronomical Records in Samguksagi, Korean J. Hist. Sci., 16, 167
  22. Park, C. 1996, Analysis of Japanese Historical Solar Eclipse Records, Korean J. Hist. Sci., 18, 155
  23. Saito, K., & Ozawa, K. 1992, Examination of Chinese Ancient Astronomical Records (in Japanese) (Tokyo: Yusankaku)
  24. Seidelmann, P. K. 1992, in Explanatory Supplement to the Astronomical Almanac, ed. P. K. Seidelmann (Mill Valley: University Science Books)
  25. Standish, E. M., 1998, JPL Planetary and Lunar Ephemerides DE405/LE405, JPL IOM 312.F-98-048
  26. Stephenson, F. R., & Morrison, L. V. 1984, Long-Term Changes in the Rotation of the Earth: 700 BC to AD 1980, Phil. Trans. R. Soc. London A, 313, 47 https://doi.org/10.1098/rsta.1984.0082
  27. Stephenson, F. R., Morrison, L. V., & Smith, F. T. 1995, Long-Term Fluctuations in the Earth's Rotation: 700 BC to AD 1990, Phil. Trans. R. Soc. A, 351, 165 https://doi.org/10.1098/rsta.1995.0028
  28. Stephenson, F. R., & Morrison, L. V. 1995, The Variation of UT from 700 BC to the Present, Highlight Astron., 10, 258 https://doi.org/10.1017/S1539299600011175
  29. Stephenson, F. R. 1997, Historical Eclipses and Earth's Rotation (Cambridge: Cambridge University Press)
  30. Stephenson, F. R., & Morrison, L. V. 2005, Historical Eclipses, in The Light-Time Effect in Astrophysics, Proc. ASP Conf. Ser., 335, 159
  31. Stephenson, F. R., Morrison, L. V., & Hohenkerk, C. Y. 2016, Measurement of the Earth's Rotation: 720 BC to AD 2015, Proc. R. Soc. A, 472, 20160404.
  32. Tanikawa, K. & Soma, M. 2004, ΔT and the Tidal Acceleration of the Lunar Motion from Eclipses Observed at Plural Sites, PASJ, 56, 879 https://doi.org/10.1093/pasj/56.5.879
  33. Watanabe, T. 1979, Nihon Chosen Chugoku nisshoku gesshoku hoten: Treasury of Solar and Lunar Eclipses (in Japanese) (Tokyo: Yuzankaku Press)