Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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A moon of 1577 km diameter at about 436,300 km from the planet Uranus. The gravity at its surface is about 0.0386 times as strong as on Earth. The moon goes once around its planet in about 8.7 days. The moon was discovered in 1787. Also called UIII (Uranus three).