Fig. 1.
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Rough estimate of the shape of Dimorphos (Didymos B), which is the target of the Double Asteroid Redirection Test (DART) mission (Sarli et al. 2017). The estimate of the physical size of Dimorphos is: long axis 164 m, second axis 126 m, and third axis 105 m, corresponding to the parameters a, b, c in Eq. (1). These are all the details that are known until a few minutes before the impact.
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