They observed that, unlike scattered disc objects such as Eris, Sedna's perihelion (76 AU) is too distant for it to have been scattered by the gravitational influence of Neptune.
Observaron que, ó contrario que os obxectos do disco disperso, tales como Eris, o perihelio de Sedna (76 UA) está moi lonxe, coma para ter sido afastado pola influencia gravitacional de Neptuno.