Norad ID: 7591
| Spacetrack Directory Name | SALYUT 4 |
| Orbit launches |
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| Deorbitation date |
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| Days in orbit | 769 |
| Country/organisation of origin | Commonwealth of Independent States (former USSR) (CIS) |
| Starting point | TYMSC (Baikonur Cosmodrome, Kazakhstan) |
SALYUT 4, 7591 was a payload satellite owned by NPO Energiya (CIS) that was launched on Thu, 26 Dec 1974 UTC via a PROTON-K launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). Payloads include a variety of satellites, spacecraft, and rockets equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.