《汉书·律历志》五星“五步”研究

Research on Wubu Record of the Five Planets Record in Lvlizhi,Book of Han

"五步"是《汉书·律历志》对五大行星运动规律的记录,它体现了汉代天文历算学家对类地行星视运动的认知范式,并被后代的各家新历所沿袭.《汉书》"五步"表征的行星运动特征虽已被充分认识,但具体文献的解释目前还仍有欠缺.通过建立适当的数学模型,再利用方程解析,全部特征名词均得到合理解释;就计算结果来看,所有观测数据其总体也是高度自恰的.

Wubu is a record of the precise position of the five planets in Book of Han. It shows the cog- nitive paradigm how astronomers or calendar organizers acquainted themselves with the apparent motions of the terrestrial planets in Han Dynasty. All of tthese records have been well carried on during the fol- lowing eras. Although primary characteristics of Wubu have been well acknowledged so far, expositions to- ward the specific literature need a further improvement. In this paper,by establishing an appropriate math- ematical model of the Five Planets＇ movement and solving relevant equations, the observation data of the five planets is analyzed. The result shows that all characteristics of the movement of the five planets can be explained and all observation data fits well logically.