Constraints on planet X/Nemesis from Solar System's inner dynamics

TL;DR

This paper uses the dynamics of inner solar system planets to place constraints on the possible location and mass of a hypothetical Planet X/Nemesis.

Contribution

It provides the first comprehensive 3D dynamical constraints on Planet X's position and mass based on inner solar system planetary motions.

Findings

Minimum distance of Planet X as a function of its position

Constraints on Planet X's mass and location

Implications for future searches of Planet X

Abstract

We put full 3D constraints on a putative planet X by using the dynamics of the inner planets of the solar system. In particular, we compute the mimium distance of X as a function of its heliocentric latitude and longitude for different values of its mass.