アポロ・ソユーズテスト計画
The mission was officially known as the Apollo–Soyuz Test Project (ASTP; , and commonly referred to in the Soviet Union as Soyuz–Apollo; the Soviets officially designated the mission as Soyuz 19). In contrast, the American vehicle was unnumbered, as it was left over from the canceled Apollo missions; it was the last Apollo module to fly.