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Cosmos 100



Cosmos 100 was the eighth Russian experimental meteorological satellite and the sixth launched from the Tyuratam site. It was the third in a series of prototype satellites that led eventually to the orbiting of Russia's first announced experimental weather satellite, Cosmos 122. No official description of the Cosmos 100 flight has ever been released. However, the orbital parameters and configuration of the satellite were so similar to those of Cosmos 122 that it is generally assumed that Cosmos 100 was a precursor to the satellites of the experimental Cosmos 'Meteor' system. The satellite was in the form of a cylinder 5 m long and 1.5 m in diameter with two solar panels attached to the sides. A steerable antenna was also mounted on the side and operated at 90 MHz. The primary objective of the flight probably was to test the basic spacecraft hardware. Tests were probably also made on improved TV and IR cloud cameras and actinometric instruments, which may have failed to operate properly. As of June 1972, the satellite remained in orbit in a deactivated mode. Similar flights were made by Cosmos 44, 58, and 118.

Alternate Names

  • 01843
  • Cosmos100

Facts in Brief

Launch Date: 1965-12-17
Launch Vehicle: Vostok 2M
Launch Site: Tyuratam (Baikonur Cosmodrome), U.S.S.R
Mass: 3800 kg

Funding Agency

  • Soviet Academy of Sciences (U.S.S.R)


  • Earth Science

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office



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