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Newly discovered dwarf planet is solar system’s most distant object
Astronomers have found a dwarf planet three times farther away from the Sun than Pluto, making it the most distant known object in the solar system. Designated V774104, the trans-Neptunian object is 500 to 1000 kilometres in diameter — half the size of Pluto — and currently lies 15.4 billion kilometres (9.6 billion miles) or 103 astronomical units (AU) from the Sun, but its exact orbit is yet to be determined.
Source: http://astronomynow.com/2015/11/12/...-planet-is-solar-systems-most-distant-object/
Contrary to what the article above states, before this discovery was made 90377 Sedna (2003 VB12) was the furthest trans-Neptunian dwarf planet in our solar system with Semi-Major Axis of 506 AU, and an Aphelion estimated to be ≈937 AU. The 103 AU distance the above article gives for V774104 is its estimated Perihelion.
Sources:
http://www.space.com/31100-most-distant-dwarf-planet-found.html
https://www.newscientist.com/articl...ystem-object-yet-could-hint-at-hidden-planet/
http://news.sciencemag.org/space/20...-solar-system-could-point-other-rogue-planets
http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=Sedna