Stellar encounters as the origin of distant Solar System objects in highly eccentric orbits

  title={Stellar encounters as the origin of distant Solar System objects in highly eccentric orbits},
  author={Scott J. Kenyon and Benjamin C. Bromley},
The Kuiper belt extends from the orbit of Neptune at 30 au to an abrupt outer edge about 50 au from the Sun. Beyond the edge is a sparse population of objects with large orbital eccentricities. Neptune shapes the dynamics of most Kuiper belt objects, but the recently discovered planet 2003 VB12 (Sedna) has an eccentric orbit with a perihelion distance of 70 au, far beyond Neptune's gravitational influence. Although influences from passing stars could have created the Kuiper belt's outer edge… Expand
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