The second point highlighted by a "-" is trying to get at that. It's not so much a pure detection issue, it's a tracking issue. My understanding is that the ro

The second point highlighted by a "-" is trying to get at that. It's not so much a pure detection issue, it's a tracking issue. My understanding is that the robotic scanning telescopes can detect these objects, but that unless they get a high-quality track, the telescope has already moved on with its scan and the NEO will be lost. That is, detection is hard, but tracking is harder, and you need tracking. And I guess my comments are also directed at the "systems" aspect of the NEO protection problem - detection, tracking, followup.