Farfarout is the farthest known object in the solar system, and it belongs to a class of object called a "Centaur". 

A centaur is an astronomical object that has characteristics similar to asteroids, comets, and dwarf planets. 

They can be thought of as objects that exist in a state between that of an asteroid and a dwarf planet. 

Even its size remains unknown, yet most estimates place its size around 250-miles (400-kilometres) across. 

Despite its small size and distance, however, it has a fairly high brightness, which suggests that its surface is covered in ice.