The Galileo spacecraft encounters a second asteroid
on its journey to Jupiter. While observing asteroid Ida at a distance
of 2400 kilometers (1500 miles), the spacecraft discovers a miniature
"moon" orbiting the asteroid Ida. This is the first conclusive
evidence that natural satellites of asteroids exist.
The tiny body, named Dactyl, is about 1.5
kilometers ( a litte less than one mile) in diameter and orbits
about 100 kilometers (62 miles) from Ida's center.