Norad ID: 7240
| Spacetrack Directory Name | COSMOS 639 |
| Orbit launches |
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| Deorbitation date |
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| Days in orbit | 11 |
| Country/organisation of origin | Commonwealth of Independent States (former USSR) (CIS) |
| Starting point | PLMSC (Plesetsk Missile and Space Complex, Russia) |
COSMOS 639, 7240 was a payload satellite owned by GUKOS RVSN (CIS) that was launched on Thu, 04 Apr 1974 UTC via a VOSKHOD 11A57 launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). 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.