Astronomers spy most distant Solar System object ever

@article{Witze2015AstronomersSM,
  title={Astronomers spy most distant Solar System object ever},
  author={Alexandra Witze},
  journal={Nature},
  year={2015}
}
  • A. Witze
  • Published 10 November 2015
  • Physics
  • Nature
Newfound world could belong to rare group of distant dwellers far beyond Pluto. 

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Discovery of a Candidate Inner Oort Cloud Planetoid

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

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.