Asteroid
Although their location in the asteroid belt excludes them from planet status, the three largest objects, Ceres, Vesta, and Pallas, are intact protoplanets that share many characteristics common to planets, and are atypical compared to the majority of "potato"-shaped asteroids. The fourth largest asteroid, Hygiea, has an undifferentiated interior, like the majority of asteroids. Between them, the four largest asteroids constitute half the mass of the asteroid belt.
Enstatite chondrite
The largest known E-type chondrite in the asteroid belt may be 21 Lutetia, with a diameter of approximately , based on observations from the "Rosetta" spacecraft, ESO's New Technology Telescope, NASA Infrared Telescope Facility, and the Spitzer Space Telescope.