Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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A moon of 3 km diameter at about 23,100,000 km from the planet Jupiter. The gravity at its surface is about 0.0001 times as strong as on Earth. The moon goes once around its planet in about 717.1 days. The moon was discovered in 2000. Also called JXXI (Jupiter twenty-one). Its provisional designation was S/2000 J10.