As with any system with an unknown, the unknown factor might actually be more than just one factor. Wether Planet 10 is a factor can only be determined once pla

As with any system with an unknown, the unknown factor might actually be more than just one factor. Wether Planet 10 is a factor can only be determined once planet 9 is observed proper (so far we only know it has be to "there" but haven't seen it) and measured sufficiently enough to be added to the models of solar system.