摘要 : Recently, Fang Lizhi and Li Shuxian have calculated the phases of 161.5±0.3d precessional period variations of SS433 by using the precessional and nodding motion model of ring model, according to the phases of short-term period va... 展开 Recently, Fang Lizhi and Li Shuxian have calculated the phases of 161.5±0.3d precessional period variations of SS433 by using the precessional and nodding motion model of ring model, according to the phases of short-term period variations of SS433, and compared their results with the analyzed and observed results given by Mammano. In this note, we study the same topic by using the precessional and nodding motion of jet model and ring model on the basis of Ref. [3]. 收起