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ytliu0 avatar ytliu0 commented on August 23, 2024

**古代五星的具体算法我未有时间涉猎，短期内不可能加入这些内容。

清朝以前的算法应可从历代的天文律历志找到，也可从介绍古代历法的书籍找到，不过听说算得很不准，听说往往有十度偏差，到了清朝引进西方的算法后才有改善，不过当时也只是引进了十六世界第谷的算法，精度不高。清朝的算法可参考康熙末年编的《御制历象考成》，网上好像有人作了注解，可以搜索一下。

现代的高精度算法是用数值积分法计算，主要用途是策划派探测器探索太阳系天体。这些高精度历表的数据可免费下载，也有网站提供数据，例如 JPL 的 Horizons 网站:
https://ssd.jpl.nasa.gov/horizons/
俄国的网站:
https://iaaras.ru/en/dept/ephemeris/online/
法国网站:
https://ssp.imcce.fr/forms/ephemeris

from chinesecalendar.

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