Satellite collision

Strictly speaking, a satellite collision is when two satellites collide while in orbit around a third, much larger body, such as a planet, moon, or space debris. This definition can be loosely extended to include collisions between sub-orbital or escape-velocity objects with an object in orbit. Prime examples are the anti-satellite tests by the USA and China (see below).

There have been no observed collisions between natural satellites of any Solar System planet or moon. Collision candidates for past events are:

Three types of collisions have occurred involving artificial satellites orbiting the Earth:

...
Wikipedia