In the present paper, we deal with the grasping aspect regarding reactive object retrieving during fast aerial pick-and-place maneuevers. The paper addresses the problem of the optimal grabbing of an object by means of a 5 degrees of freedom (DoF) gripper. Also, is introduced the optimization framework for the identification of the optimal contact points between the end-effector and the object. In particular, we define an objective functional to evaluate the optimality of the contact points and we propose a preliminary strategy to identify the optimal contact points. Simulations and experimental are presented to support the actual proposal.