Asteroid 243 Ida
Asteroid 243 Ida On its way to the Jupiter system, Galileo passed by asteroid 243 Ida, discovering that it had a satellite, now named Dactyl. This is a mosaic of 5 images captured on August 28, 1993, shortly before closest approach. Ida is an S-type asteroid, about 58 by 23 kilometers in size. NASA / JPL / Ted Stryk