 Olbers discovered and named the asteroid (2) Pallas, a second object in roughly the same orbit as (1) Ceres.Olbers proposed that these two discoveries were the fragments of a disrupted planet that had formerly orbited the Sun, and predicted that more of these pieces would be found.The discovery of the asteroid (3) Juno by Karl Ludwig Harding and (4) Vesta by Olbers, buttressed his hypothesis.