Provisionally named 2018 VG18, but nicknamed Farout by its discoverers, the body is 120 astronomical units (AU) from the sun. One AU is equal to the average distance from the Earth to the sun, or just under 150m kilometres. The previous furthest known object was Eris, 96 AU from the sun.
“2018 VG18 is much more distant and slower moving than any other observed solar system object, so it will take a few years to fully determine its orbit,” .....
The team say Farout’s brightness suggests it is about 500km (310 miles) wide, and it is probably spherical. It has a pinkish hue, which they say means it is probably covered in ice.