400,324 Henryson was a small, crater-ridden planetoid that was located in the Sil'Lume asteroid belt, in the Sil'Lume system. The planetoid was about a kilometer in length and about half a kilometer in both width and thickness. Henryson was the 400,324th planetoid in the Sil'Lume Asteroid Belt to be catalogued as the property of a sentient being and during the Galactic Civil War, it was the site of a hospice.