A trans-Neptunian object, also written transneptunian object, is any minor planet in the Solar System that orbits the Sun at a greater average distance than Neptune, which has an orbital semi-major ax
Pluto, the first known TNO, imaged by New Horizons in 2015.
Looking back at Pluto, the largest visited KBO so far
Gonggong is a dwarf planet and a member of the scattered disc beyond Neptune. It has a highly eccentric and inclined orbit during which it ranges from 33–101 astronomical units from the Sun. As of 202
Low-resolution Hubble Space Telescope image of Gonggong and its moon Xiangliu (Pointed at by arrow), 2010.
Gonggong was discovered using the Samuel Oschin telescope at Palomar Observatory
Hubble images of Gonggong and Xiangliu, taken in 2009 and 2010 with the Wide Field Camera 3