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In this paper we present results of our studying of famous very young pair ofasteroids 6070 Rheinland and 54827 (2001 NQ8). We have done numeric integrationof orbits of pair with only planet perturbations and include Ceres and Vestaeffect. We have confirmed results of previous studying, obtained with differentintegrators. And we confirm significant effect of Ceres and Vesta perturbationon dynamic of this pair. We find that effect of other massive asteroids isinsignificant. According our results, more probable age of 6070 Rheinland and54827 (2001 NQ8) pair is 16.2 kyrs. Our value of age is very close to mostrecent age determination by Vokrouhlicky et al [12], obtained with differentmethod. After the compare our results, we can conclude, that non-gravitationalforces are small and large number of clones is not necessary in studying ofthis pair. As an additional way of studying of close orbits dynamics, wecalculate relative velocity in pair during numeric integration. Normalcomponent of velocity show a very good convergence at epoch of closestencounter in pair.

On age of 6070 Rheinland and 54827 (2001 NQ8) asteroid pair