Above: Planetoid (or asteroid) Ida with the newly discovered moon. The moon was named Dactyl.
Ida is about 30 km and the moon 1 km in diameter. (NASA: Idamoon.gif)
Under: Gaspra is an irregular body with dimensions about 19 x 12 x 11 kilometers.
The portion illuminated in this view is about 18 kilometers (11 miles) from lower left to upper right.
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