明嘉靖六年《大统历》历书的气朔推步精度

历书是历法的民用本.考察了明嘉靖六年(1527年)<大统历>历书,根据历书所颁朔日和节气时刻,以及先期恢复的<授时历>和<大统历>推步术,并利用现代天文历算结果,可考校得出:(1)历书所载朔日和节气日期、时刻确由<大统历>推得;(2)<大统历>与<授时历>推步结果存在差异,推朔平均差33.35 min或34.93 min,推气平均差86.40 min,且两者均有差1日现象;(3)<大统历>与现代推算合朔时刻的平均误差为24.50 min或44.03 min,与现代推算节气时刻的差平均为1.25 d,若扣除太阳中心差则节气推步的误差将减少到86.40 min.

Accuracy of Calculation for the Solar Terms and the Syzygys in the calendar of Datong Lishu 1527

Usually in ancient time the Lishu,published and consisted of the counting results according to the calendar of Li added other traditional culture items,was used for average people. For example Datong Lishu was calculated from the calendar of Datong Li.In this paper,we investigate the Datong Lishu published in the sixth year in Jiajing period(1527),Ming dynasty (1368-1644).According to the recorded new moon dates and the times of solar terms in this year, both data with Chinese styles,and by use of our previ...