Constraints on Planet Nine’s Orbit and Sky Position within a Framework of Mean-motion Resonances

  title={Constraints on Planet Nine’s Orbit and Sky Position within a Framework of Mean-motion Resonances},
  author={Sarah C. Millholland and Gregory Laughlin},
  journal={The Astronomical Journal},
A number of authors have proposed that the statistically significant orbital alignment of the most distant Kuiper Belt Objects (KBOs) is evidence of an as-yet undetected planet in the outer solar system, now referred to colloquially as "Planet Nine." Dynamical simulations by Batygin & Brown have provided constraints on the range of the planet's possible orbits and sky locations. We extend these investigations by exploring the suggestion of Malhotra et al. that Planet Nine is in small integer… 
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