Not really a candidate for Nero, it is or will be an ice giant. Landing on them is impossible due to strong winds (900 km/h on Uranus, 2400 km/h on Neptune).
There are many trans-neptunians that are still undiscovered, something will turn up that will fit the bill though. And since we find a few every year it is only a matter of time.
MC3 homebrewer. Check the thread!
CA-138 Deathlockdrum - when you want to put a grenade launcher on a grenade launcher, so you can launch grenades when launching grenades.