It is easily the biggest of the F-type asteroids, but there are few details of what the inside is made of or shape and no lightcurve analysis has been done to find out the ecliptic coordinates of Interamnia's poles (and its axial tilt). Its apparently high bulk density (though subject to much error) suggests a very solid body entirely without internal porosity or traces of water. This also strongly suggests that Interamnia is big enough to have withstood all the collisions that have happened in the asteroid belt since the Solar System was made.