Circularizing Planet Nine through dynamical friction with an extended, cold planetesimal belt

  title={Circularizing Planet Nine through dynamical friction with an extended, cold planetesimal belt},
  author={L.E.J. Eriksson and Alexander J. Mustill and Anders Johansen},
  journal={Monthly Notices of the Royal Astronomical Society},
Unexpected clustering in the orbital elements of minor bodies beyond the Kuiper belt has led to speculations that our Solar system actually hosts nine planets, the eight established plus a hypothetical 'Planet Nine'. Several recent studies have shown that a planet with a mass of about 10 Earth masses on a distant eccentric orbit with perihelion far beyond the Kuiper belt could create and maintain this clustering. The evolutionary path resulting in an orbit such as the one suggested for Planet… 

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