On the origin of extreme trans-Neptunian objects within Modified Newtonian Dynamics

Abstract In this work, we investigate the dynamical origin of extreme trans-Neptunian objects (ETNOs) under action External Field Effect (EFE), which is a consequence Modified Newtonian Dynamics (MOND) applied to gravity around Sun embedded in gravitational field Galaxy. We perform N-body integrations known ETNOs treated as massless particles and perturbed by four giant planets EFE. Backward show that these originated planet region, from where they were scattered then evolved their current orbits. A striking example such evolution Sedna, may have been temporarily horseshoe orbit with Jupiter Saturn only 30 Myr ago. Another interesting newly discovered retrograde ETNOs, whose connection prograde Centaurs shown. The EFE considered an alternative Planet Nine explaining anomalous distribution ETNO orbits, namely orbital plane clustering apsidal confinement. also analyse effect MOND on obliquity solar spin respect invariant system.