In 2018, a group of astronomers believed they’d found a new dwarf planet well past Pluto. Recently, scientists confirmed the discovery and have temporarily named it FarFarOut. It’s been given the designation of 2018AG37 until the International Astronomical Union can name it properly.
FarFarOut is said to be approximately 250 miles in diameter making it very small, even for a dwarf planet. Its orbit averages 101 astronomical units (AU). To put that in perspective, the Earth’s orbit is 1 AU and Pluto’s is 39. However, FarFarOut’s orbit is an oval so astronomers believe it may come as close at 27 AU (the approximate distance of Neptune) and as far as 175. They estimate FarFarOut takes around 800 years to make one lap of our Sun.