Tremanre is a dwarf planet composed of light magnesium silicates, with deposits of aluminium. Its surface is covered by wide swathes of ancient, dark basaltic lava, possibly indicating the world was created through an impact with some other body in the system.
Tremanre's magnetic field is nonexistent. This makes it impossible for ships to dump drive charge from orbit. That said, Tramenre's miniscule gravity allows even cruiser-sized vessels to land safely for direct grounding.