ESA's 4.4t Eureca (European Retrievable Carrier) was released from Space Shuttle Atlantis during mission STS-46 on 2 August 1992 carrying 15 microgravity, space science and technology experiments. Eureca's own hydrazine propulsion system raised the orbit to 508 km, and full operations began. The mission was rated as highly successful. Eureca was retrieved by Shuttle mission STS-57 on 24 June 1993. [Image Date: 02-08-92] [92.08.009-028]