exorbital
/ɛksˈɔrbɪtəl/Definitions
1. adjective
relating to or being above the orbit of a celestial body
“The exorbital trajectory of the spacecraft allowed it to reach the outer planets.”
2. noun
a celestial body or object that is outside the orbit of a planet or other celestial body
“The exorbitals of the solar system include the dwarf planet Pluto and several other icy bodies.”