>and likely would not be observed until it was already on its way here. That's my whole point: if we were more serious about this, we'd have orbital observatio

>and likely would not be observed until it was already on its way here. That's my whole point: if we were more serious about this, we'd have orbital observation platforms looking for all these objects and keeping track of them all, so that we aren't surprised by anything short of another asteroid from totally outside the solar system like that one a couple years ago.