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2 Pallas: Pallas, minor-planet designation 2 Pallas, is the second asteroid to have been discovered, and it is one of the largest asteroids in the Solar System. It is estimated to comprise 7% of the mass of the asteroid belt, and its diameter of 544 kilometres is slightly larger than that of 4 Vesta. It is 10–30% less massive than Vesta, placing it third among the asteroids. It is likely a remnant protoplanet.
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