Detection of a Trailing (L5) Neptune Trojan

@article{Sheppard2010DetectionOA,
  title={Detection of a Trailing (L5) Neptune Trojan},
  author={Scott S. Sheppard and Chadwick A. Trujillo},
  journal={Science},
  year={2010},
  volume={329},
  pages={1304 - 1304}
}
An asteroid follows the orbit of the planet Neptune in a region of gravitational stability. The orbits of small Solar System bodies record the history of our Solar System. Here, we report the detection of 2008 LC18, which is a Neptune Trojan in the trailing (L5) Lagrangian region of gravitational equilibrium within Neptune’s orbit. We estimate that the leading and trailing Neptune Trojan regions have similarly sized populations and dynamics, with both regions dominated by high-inclination… 
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TLDR
The detection of a Uranian Trojan is reported and a Centaur model is constructed, supplied from the transneptunian region, to estimate temporary co-orbital capture frequency and duration, finding that at any time 0.4 and 2.8% of the population will be Uranian and Neptunian co-orbitals, respectively.
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