Description: Paper VII of the ATMAN v5.0 series. A two-dimensional mass-distance sweep over a hypothetical third trans-Neptunian perturber P3 with M∈1,20M⊕ and a∈800,2500au, using ATMAN v5.0 with Erebo and Solution B as fixed background bodies. Three Sednoids tracked as test particles: Sedna, 2012 VP113, Leleakuhonua. Best-fit solution: MP3=12M⊕, aP3=1000au, producing ΔqSedna=+7.46au and joint score Sjoint=0.692 — highest in the series. SHA-256: 60c348fd1859e32f5bb45b4e155e4ef52f1f33c5ce823a83aaba536bc8553229. Paper VII of the ATMAN v5.0 series.
Ariel Fernando Martini (Sun,) studied this question.