this post was submitted on 20 Feb 2025
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It's a shame you're being downvoted for genuine questions.
We know where all the big rocks are. Those smaller than a few hundred meters are much harder to spot.
It definitely could, but we don't really have astrometry telescopes beyond earth orbit. I can't wait until launch costs get low enough for us to yeet Hubble-class or Arecibo-class telescopes all over the solar system, and maybe even do interferometry between them.
Not compared to the dinosaur killer. Chicxulub was around 10 kilometers wide, while 2024 YR4 is estimated to be ~100 meters wide. A hundred-fold increase in linear size roughly corresponds to million-fold increases in volume, mass, and energy. 2024 YR4 could wipe out a city, but nothing close to the effects of Chicxulub.
Yeah, I think we've catalogued those pretty extensively, and pinned down their orbits well enough to conclude that none of them pose a significant threat in the next century or so.