A new study finds DART's impact could be stronger than expected.
DART will impact Dimorphos at around 4.1 miles per second , or 14,760 mph , which mission scientists hope will cause the moonlet's orbital speed to change by a fraction of a millimeter per second, just enough to alter its orbit around the larger asteroid.
This new model suggests that the DART mission could eject more material from Dimorphos than expected, and potentially alter its course much more strongly than in previous estimates.
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