Even assuming that it would be practical to match the inoperative's satellite orbit to the required precision to have "collision speeds measured in mm/s", the c

Even assuming that it would be practical to match the inoperative's satellite orbit to the required precision to have "collision speeds measured in mm/s", the contact interface would need to be perfectly on the center of mass - otherwise any further propulsive maneuvers would cause it to tip to one side. The exterior faces of satellites are really unsuitable for this unless they are specifically designed for this. > satellites already have a star tracker that includes a capable camera Which is focused at infinity. Neither the hardware nor the software is capable of tracking a big object nearby and providing feedback to align itself how you're proposing, without significant changes. Edit: just to give an idea of how difficult docking in space is in general, take a look at the International Docking System Standard (used on the ISS): https://www.internationaldockingstandard.com/ https://www.internationaldockingstandard.com/ Table 3.3.1.1-2 tells you the conditions for docking; velocities of 50-100mm/s are expected. And look at how much hardware is needed to dampen the energy. It has 6 DoF actuators, hydraulic components, etc. etc. And that's for the ISS - all spacecraft going there are specifically designed to be able to accurately approach and dock with the ISS. There's just no way you can get that level of precision with a satellite bus designed for communications and station keeping.