Didymos currently spins at a rate of once every 2-1/4 hours.
WASHINGTON - In the moments before NASA's DART space craft slammed into the asteroid Dimorphos in a landmark planetary defense test in 2022, it took high-resolution images of this small celestial object and its larger companion Didymos.
Didymos probably formed in our solar system's main asteroid belt, between the planets Mars and Jupiter, and then was knocked into the inner solar system, the researchers said. "These large boulders could not have formed from impacts on the surfaces of Didymos and Dimorphos themselves, as such impacts would have disintegrated these bodies," Pajola added.
The largest on Dimorphos is the size of the school bus, while the largest on Didymos is big as soccer field," said Olivier Barnouin, a planetary geologist and geophysicist at the Johns Hopkins University Applied Physics Laboratory in Maryland and lead author of another of the studies. Few boulders were observed at the equatorial region of Didymos.
The collision also slightly changed the shape of Dimorphos. The DART data has improved the understanding of binary asteroid systems.
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