Group: Planemo Group
Class: Endothermic Class
Type: Nyxian

These are smaller versions of Hautean worlds, less than 0.1 Earth masses. They have a thin, cold atmosphere and an icy surface. The atmosphere will often mostly consist of outgassing from the planet's interior, though much of it will have frozen solid or rained out.

Surface ice will be nitrogen or carbon dioxide, with little hydrogen or helium.

Geology and any hope of plate tectonics is non existent.