 Both of these discoveries — the space weathering effects and the low density — led to a new understanding about the relationship between S @-@ type asteroids and OC meteorites . S @-@ types are the most numerous kind of asteroid in the inner part of the asteroid belt . OC meteorites are , likewise , the most common type of meteorite found on the Earth 's surface . The reflection spectra measured by remote observations of S @-@ type asteroids , however , did not match that of OC meteorites . The Galileo flyby of Ida found that some S @-@ types , particularly the Koronis family , could be the source of these meteorites . 
