Simplify the following text for a Grade 13 native English-speaking person.
Original: Another difference is that Interamnia 's perihelion is located on the opposite side from the perihelia of the `` big four '' , so that Interamnia at perihelion is actually closer to the Sun than Ceres and Pallas are at the same longitude .
Simplified: Another difference is that Interamnia 's perihelion is at the other side of the perihelia of the `` big four '' , so that at Interamnia at perihelion is actually closer to the Sun than Ceres and Pallas are at the same longitude .