S-type asteroids, or silicate asteroids, are primarily composed of silicate minerals and metallic iron. They are found mainly in the inner region of the asteroid belt between the orbits of Mars and Jupiter. These asteroids are known for their relatively high albedo, meaning they reflect more sunlight compared to other types. These asteroids are important for scientific study because they are thought to be remnants from the early solar system. Their composition can provide insights into the formation of terrestrial planets like Earth. Some well-known S-type asteroids include 433 Eros and 243 Ida.