He also discovered, or co-discovered, the periodic comets 49P/Arend-Rigaux and 50P/Arend, Nova Scuti 1952, and a number of asteroids, including notably the Amor asteroid 1916 Boreas and the Trojan asteroid 1583 Antilochus.
Bol tiež objaviteľom, alebo spoluobjaviteľom periodických komét 49P/Arend-Rigaux a 50P/Arend, 1952 Nova Scuti, a početných planétok (asteroidov), vrátane Amora 1916 Boreas a Trójana 1583 Antilochus.