Mathilde

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Mathilde A solar system asteroid (No. 253), measuring 50 × 53 × 57 km; approximate mass 1017 kg; density 1.3 g/cm3; rotational period 417.7 hours; orbital period 4.32 years. It was imaged by the Near Earth Asteroid Rendezvous mission in June 1997, revealing 5 craters more than 20 km across, the largest being 30 km wide and 6 km deep.

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