Dwarf planet stretches Solar System's edge

@article{Witze2014DwarfPS,
  title={Dwarf planet stretches Solar System's edge},
  author={Alexandra Witze},
  journal={Nature},
  year={2014}
}
  • A. Witze
  • Published 26 March 2014
  • Physics, Geology
  • Nature
Icy body found far beyond Pluto raises questions about cosmic history. 

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We report the discovery of the minor planet (90377) Sedna, the most distant object ever seen in the solar system. Prediscovery images from 2001, 2002, and 2003 have allowed us to refine the orbit
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We present the results of a wide-field survey using the 1.2 m Samuel Oschin Telescope at Palomar Observatory. This survey was designed to find the most distant members of the Kuiper Belt and beyond.
A Sedna-like body with a perihelion of 80 astronomical units
TLDR
The detection of 2012 VP113 confirms that Sedna is not an isolated object; instead, both bodies may be members of the inner Oort cloud, whose objects could outnumber all other dynamically stable populations in the Solar System.