When the Stranger travelled in time to this age, Neptune was located at coordinates 4,0,5. The planet could be visited flying on a rocket ship, which can be acquired from the post-apocalyptic Soviet settlement of Pirates Harbour.
Neptune in Minax's twenty-second century universe has a surface that consists almost entirely of sweeping and largely barren plains. A small enclave of computer programmers, entrenched near the solitary mountain on the planet, comprises the only intelligent life on the planet, although its origins are unclear. They probably are space travellers from the Earth, like the Stranger himself.
After the Time Doors closed and the ahistorical timeline became inaccessible, any other information about it is unknown.