She discovered or co-discovered several comets, including periodic comets 38P/Stephan-Oterma, 39P/Oterma and 139P/Väisälä–Oterma.
Ea a descoperit sau co-a descoperit mai multe comete, inclusiv comete periodice 38P/Ștefan-Oterma, 39P/Oterma și 139P/Väisälä–Oterma.