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Journal of University of Chinese Academy of Sciences ›› 2021, Vol. 38 ›› Issue (1): 114-120.DOI: 10.7523/j.issn.2095-6134.2021.01.014

• Research Articles • Previous Articles     Next Articles

Comparison and analysis of three kinds of typical solar system planetary ephemeris

ZHANG Wenzhao1, PING Jinsong2,3, LI Wenxiao2,4   

  1. 1. Astronomy Department, Beijing Normal University, Beijing 100875, China;
    2. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China;
    3. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
    4. Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China
  • Received:2019-06-03 Revised:2019-08-22 Online:2021-01-15

Abstract: The US DE series, the French INPOP series, and the Russian EPM series ephemerides are three types of the world’s leading numerical planetary ephemerides. In this paper, the maximum values and the root-mean-squares of the positions of the major planets (including moon) relative to the earth and the barycenter of the solar system in the three numerical ephemerides during one hundred years (1960-2060) are calculated. The results show that the deviation levels of the measurements about the solar system barycenter range from hundred meters to kilometers, and the differences between EPM2017 and the other two are large. Taking the earth as the reference point,the accuracies for Mercury and Venus are at one hundred meter level. The accuracy of Mars ranges from hundred meters to kilometers. The accuracies for Jupiter and Saturn range from several kilometers to tens of kilometers. The accuracies for Uranus and Neptune range from several hundred kilometers to thousands of kilometers. The accuracy of Lunar ephemeris ranges from decimeter to meter, and its radial distance accuracy is at the decimeter level. These results provide support and basis for the cislunar space science experiment and deep space exploration application.

Key words: planetary ephemeris, accuracy, comparison

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