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In this work we analyse the similarities and differences between theequations of motion for the center of mass and intrinsic angular momentum forisolated sources of gravitational radiation obtained by two differentformulations. One approach is based on the asymptotic formulation of the GRwhereas the other relies on Post- Newtonian methods. Several conclusions areobtained which could be useful for further developments in both approaches.

Spin and Center of mass comparison between the PN approach and the asymptotic formulation