In 2004, scientists found Sedna, a potential dwarf planet beyond the belt, had a strange orbit around the sun that hinted another large mass was gravitationally pulling it. A 2014 study found a ...

such as the dwarf planet Sedna which was discovered in 2003. Other objects with bizarre orbits are 2008 KV42 and 2011 KT19 which move almost perpendicular to Neptune's orbit. “The best match for ...