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

Chadwick A. Trujillo, Scott S. Sheppard

Research output: Contribution to journalArticlepeer-review

234 Scopus citations


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 fromthe Sun.The 1,000-kilometre-diameterdwarf planet Sedna was discovered ten years ago and was unique in that its closest approach to the Sun (perihelion) is 76 AU, far greater than that of any other Solar Systembody1. Formation models indicate that Sedna could be a link between the Kuiper belt objects and the hypothesized outer Oort cloud at around 10,000 AU fromthe Sun2-6. Herewe report the presence of a second Sedna-like object, 2012VP113, whoseperihelion is 80 AU. The detection of 2012VP113 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.

Original languageEnglish (US)
Pages (from-to)471-474
Number of pages4
Issue number7493
StatePublished - 2014
Externally publishedYes

ASJC Scopus subject areas

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