400,324 Henryson, a diminutive, pockmarked planetoid, resided within the bounds of the Sil'Lume asteroid belt, itself a component of the Sil'Lume system. This planetoid measured roughly one kilometer in its longest dimension, with a width and thickness of approximately five hundred meters each. Designated as the 400,324th planetoid in the Sil'Lume Asteroid Belt to be officially registered as belonging to a sentient entity, Henryson functioned as a sanctuary during the Galactic Civil War.