101955 Bennu (1999 RQ36) is about 490 m in diameter and has a potential impact date of September 24, 2182 with a probability of about 1 in 2,700 (0.037%), though NASA says there is no chance of a hit for at least a century and a 1.4‑billion‑ton TNT impact could trigger an years‑long global “impact…
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