Information
Explore history, facts, modules, and life on board Salyut 4.
Salyut 4
A successful first-generation Soviet research station with crewed Salyut expeditions and X-ray astronomy.
Salyut 4 was launched on December 26, 1974 into a 51.6-degree low Earth orbit. NASA HEASARC describes the station's Filin X-ray telescope and notes that Salyut 4 reentered Earth's atmosphere on February 2, 1977. During Soyuz 18, Klimuk and Sevastyanov spent nearly 63 days aboard the station, continuing biomedical, Earth-observation, solar-observation, and station systems work.
Launch
1974-12-26
Launched as a Soviet low Earth orbit research station.
Orbit
51.6 deg
NASA HEASARC lists a 51.6-degree inclination and roughly 91-minute orbital period.
Science
Filin telescope
Salyut 4 carried X-ray astronomy instrumentation that observed sources including Sco X-1 and Cyg X-1.
All values are approximate and vary with configuration.