 S-types may share their composition with stony-iron or ordinary chondrite (OC) meteorites.The composition of the interior has not been directly analyzed, but is assumed to be similar to OC material based on observed surface color changes and Ida's bulk density of 2.27–3.10 g/cm3.OC meteorites contain varying amounts of the silicates olivine and pyroxene, iron, and feldspar.