[retrochameleon]

Asteroid detection is certainly affected by satellites. The ever increasing number of satellites makes observations that normally detect asteroids very difficult. It is very easy to miss asteroids we would have seen otherwise if not for satellites giving off glare, reflections, and light. We don't just look for asteroids coming directly towards earth, we keep track of all sorts of large objects and their orbits in our solar system. The tracking authority is usually the IAUC Minor Planet Center.