Kosmos 238 ( meaning Cosmos 238) was the final test series of the Soviet Soyuz spacecraft prior to the launch of Soyuz 2. It tested the orbital maneuvering system, reentry, descent and landing systems that had been modified and improved after the Soyuz 1 accident. Mission parameters Spacecraft: Soyuz 7K-OK Mass: 6520 kg Crew: None Launched: 28 August 1968, 10:04:00 GMT Landed: 1 September 1968, 09:03:00 GMT Perigee: 194 km Apogee: 313 km Inclination: 51.7° Period: 88.5 minutes NSSDC ID: 1968-072A References Text comes from NASA NSSDC Master Catalog Soyuz uncrewed test flights Kosmos satellites 1968 in the Soviet Union Spacecraft launched in 1968