A Sedna-like body with a perihelion of 80 astronomical units

@article{Trujillo2014ASB,
  title={A Sedna-like body with a perihelion of 80 astronomical units},
  author={Chadwick A. Trujillo and Scott S. Sheppard},
  journal={Nature},
  year={2014},
  volume={507},
  pages={471-474}
}
The observable Solar System can be divided into three distinct regions: the rocky terrestrial planets including the asteroids at 0.39 to 4.2 astronomical units (au) from the Sun (where 1 au is the mean distance between Earth and the Sun), the gas giant planets at 5 to 30 au from the Sun, and the icy Kuiper belt objects at 30 to 50 au from the Sun. The 1,000-kilometre-diameter dwarf planet Sedna was discovered ten years ago and was unique in that its closest approach to the Sun (perihelion) is… 

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