Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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A moon of 86 km diameter at about 11,741,000 km from the planet Jupiter. The gravity at its surface is about 0.0032 times as strong as on Earth. The moon goes once around its planet in about 259.8 days. The moon was discovered in 1905. Also called JVII (Jupiter seven).