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this post was submitted on 20 Feb 2025
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So what level of calamity are we talking about here? 3% doesn’t sound that low to me.
I recall hearing it was medium-ish nuclear weapon sized, but not wipe out civilisation size. Wherever it's heading would need to be evacuated.
That was a week ago, though, and I'm sure the size projections will be updated as we get more data.
We'll get a better idea of whether it'll hit or not in 2028 the next time it passes close to earth, which will give us plenty of time to respond before it might hit in 2032.
Except that 2028 would also be our window to do something about it before it disappears back into space. There needs to be a plan now, even if that plan is to wait and see where it's going to hit.
In short, we already have a plan. DART proved that we can do it, and off-the-shelf rockets like the Falcon 9 have plenty of performance. All that remains is to wait until early 2028 when we get a proper fix on the asteroid, then we've got 7 or 8 months to prep and launch a mission before the window of opportunity closes.
https://www.youtube.com/watch?v=kK5IXX4p2d0