Asu na Imperial babban nau'in asu ne mai ban sha'awa na dangin Saturniidae. Sunan kimiyya Eacles imperialis, kuma ana samunsa da farko a gabashin Amurka. Moths na Imperial namiji da mace sun bambanta a bayyanar, tare da mazan suna da launuka masu haske da manyan fuka-fuki, suna kaiwa zuwa inci 7 (18 cm) a fadin. Asu na Imperial suna haka ne saboda kamanninsa na sarauta, tare da girman girmansa da launuka masu ban sha'awa suna ba ta girma.