Kosmos 656 ( meaning Cosmos 656) was an unmanned test of the Soyuz 7K-T, a variant of the Soyuz spacecraft. This Soyuz variant was intended for flights to the Almaz military space stations. Mission parameters Mass: Perigee: Apogee: Inclination: 51.6° Period: 90.0 minutes References Kosmos satellites Soyuz uncrewed test flights 1974 in the Soviet Union Spacecraft launched in 1974