You know, they say we are tracking these for early warning, but in the last two years there have been quite a few, surprise this is something we didn’t see events.
While I understand the distances, the number of oops seems high.
A set of orbiting observatories that use radar instead of optical telescopy is what is needed. Ten years ago, using a small subset of the data currently available, it was pronounced that the number of undiscovered large unknown objects was only about a tenth of what had been suspected. As you note, there continue to be these little surprises.