Kosmos 613 ( meaning Cosmos 613) was a long-duration orbital storage test of the Soyuz Ferry in preparation for long stays attached to a space station. Mission parameters Spacecraft: Soyuz-7K-T Mass: 6800 kg Crew: seeds Launched: November 30, 1973 Landed: January 29, 1974 See also 1973 in spaceflight References External links Mir Hardware Heritage Mir Hardware Heritage - NASA report (PDF format) Mir Hardware Heritage (wikisource) Kosmos satellites Soyuz uncrewed test flights 1973 in the Soviet Union Spacecraft launched in 1973