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	Soyuz 19	July 15-July 21, 1975
	Alexei Leonov, Valeri Kubasov Crew code name—Soyuz Docked with Apollo through the intermediary of a docking module using the APAS-75 unit on July 17, 1975 (figure 1-23). Soyuz 19 was officially referred to as Soyuz, just as the Apollo craft used was simply called Apollo (while some sources refer to the craft as Apollo 18, this was not the official designation). The craft undocked on July 19, redocked for 3 hours, then separated to conduct independent operations. Apollo landed after Soyuz, on July 24, 1975.

	Soyuz 22	September 15-23, 1976
	Valeri Bykovski, Vladimir Aksyonov Crew code name –Yastreb Flight of the backup ASTP Soyuz. In place of the APAS-75 androgynous docking system or other docking apparatus, it carried an East German MKF-6 camera. It operated in a 64.75° orbit to improve its abilities as an Earth observation platform.

Figure 1-23. Apollo and Soyuz join in space. Note the docking module (DM) attached to Apollo’s nose. The DM was stored for launch within a shroud between the CSM and the S-IVB second stage of the Apollo Saturn IB launch vehicle. In orbit the Apollo inserted its probe unit into the standard Apollo drogue unit of the docking module, extracted the DM from the S-IVB, then performed rendezvous and docking with the Soyuz spacecraft.