Some of his notable discoveries are 1221 Amor (whose name was later used for the Amor asteroids) and the Apollo asteroid, 2101 Adonis. Delporte discovered some comets as well, including periodic comet, 57P/du Toit-Neujmin-Delporte. He worked in the Observatoire Royal de Belgique (Belgian Royal Observatory), located in the town of Uccle (which was used to name 1276 Ucclia).