). we rounded the decimal part of the their stepsizes to 8 to make the stepsize a multiple of 2 in order to reduce the accumulation of round-off error in the computation processes. in relation to this， wisdom & holman (1991) performed numerical integrations of the outer five planetary orbits using the symplectic map with a stepsize of 400 d， 1/10.83 of the orbital period of jupiter. their result seems to be accurate enough， which partly justifies our method of determining the stepsize. however， since the eccenicity of jupiter (～0.05) is much smaller than that of mercury (～0.2)， we need some care when we compare these integrations simply in
对火星轨道变化问题的最后解释(15/49)