Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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A moon of 4 km diameter at about 24,046,000 km from the planet Jupiter. The gravity at its surface is about 0.0002 times as strong as on Earth. The moon goes once around its planet in about 761.6 days. The moon was discovered in 2001. Also called JXXVIII (Jupiter twenty-eight). Its provisional designation was S/2001 J1.