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The near-Earth asteroid Atira is orbited by the moonlet S/2017 (163693). In 2022 scientists studying asteroid deflection intentionally crashed a probe into a similar moonlet, Dimorphos, shortening its orbital period by 32 minutes. it used to take Dimorphos 11 hours, 55 minutes to orbit the near-Earth asteroid Didymos; now it takes 11 hours, 23 minutes.