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Updated Numerical Ephemerides of the Galilean Satellites of Jupiter
Astronomy Letters ( IF 0.9 ) Pub Date : 2020-02-26 , DOI: 10.1134/s1063773719110033
G. A. Kosmodamianskiy

New versions of the ephemerides for the Galilean satellites of Jupiter (Io, Europa, Ganymede, and Callisto) constructed by numerically integrating the equations of motion of the satellites are presented. The satellite motionmodel takes into account the non-sphericity of Jupiter, the mutual perturbations of the satellites, and the perturbations from the Sun and major planets. The initial satellite motion parameters have been improved based on all the available series of ground-based optical observations spanning the interval 1891-2017, spacecraft observations, and radar observations. As a result, the coefficients of the expansion of the satellite coordinates and velocities in terms of Chebyshev polynomials in the interval 1891- 2025 have been obtained. The root-mean-square errors of the observations and the graphs of comparison of the constructed ephemerides both with the observations and with Lainey's numerical ephemerides are presented. The constructed ephemerides are publicly accessible.

中文翻译:

木星伽利略卫星的更新数值星历

介绍了通过对卫星的运动方程进行数值积分而构造的木星伽利略卫星(Io,Europa,Ganymede和Callisto)星历表的新版本。卫星运动模型考虑了木星的非球形性,卫星的相互扰动以及太阳和主要行星的扰动。最初的卫星运动参数已基于所有可用的一系列范围为1891-2017的地面光学观测,航天器观测和雷达观测得到了改善。结果,获得了在1891至2025区间的切比雪夫多项式的卫星坐标和速度的膨胀系数。给出了观测值的均方根误差以及所构造星历与观测值以及与Lainey数值星历的比较图。人工构造的星历表是公开可用的。
更新日期:2020-02-26
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