太阳月亮章动参数和各大行星章动参数的计算-Sun, moon and major planets nutation nutation parameters calculation parameters

外国网站下载的用于行星星历计算，包括各种时间的计算和转换，岁差、章动等的计算。-Foreign website for planetary ephemeris calculation, including the various time calculation and the calculation of the conversion, precession, nutation.