Rendezvous and Docking maneuvers (RVD) always have been, and still are, one of the most delicate operations that have to be performed during a space mission. When two spacecrafts are only few meters away from each other, their relative position, attitude and velocity have to be controlled precisely in order to fulfill the end conditions of the maneuver and to avoid the collision between the two orbiting bodies. Within the context of this thesis, the satellites involved in the close-approach maneuver are SROC (Space Rider Observer Cube) and its mothercraft, Space Rider (SR). SROC is a 12U microsatellite designed by ESA in collaboration with Politecnico di Torino, Tyvak international and Universit`a di Padova, which will be part of the Space Rider mission.