Znamya (space mirror)

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The Znamya project was a series of experimental orbital mirrors, designed to beam solar power to Earth by reflecting sunlight. It consisted of two experiments - the Znamya 2 experiment, and the failed Znamya 2.5 - and the proposed Znamya 3. The project was abandoned by the Russian Federal Space Agency after the failed deployment of the Znamya 2.5.

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[edit] Znamya 2

The Znamya 2 was a 20-meter wide space solar mirror. Znamya-2 was launched aboard Progress-TM-15 from Baikonur on 27 October 1992. After visiting the EO-12 crew aboard the Mir space station the Progress-TM-15 then undocked and deployed the reflector from the end of the Russian progress spacecraft on February 4, 1993, next to the Russian Mir spacestation. The mirror deployed successfully, and, when illuminated, produced a 5 km wide bright spot, which traversed Europe from southern France to western Russia at a speed of 8 km/hour.[1] The bright spot had a luminosity equivilant to approximately that of a full moon.[2] The mirror was de-orbited after several hours, and burned up in atmospheric reentry over Canada[1][2].

[edit] Znamya 2.5

The Znamya 2.5 was a successor to the Znamya 2, which was deployed on February 5, 1999. It had a diameter of 25 m, and was expected to produce a bright spot 7 km in diameter, with luminosity between five and ten full moons. However, soon after deployment, the mirror caught on an antenna on Mir, and ripped. After several vain attempts by Russian mission control to free the mirror from the antenna, the Znamya 2.5 was de-orbited, and burned up upon reentry.[3], [4][3].

[edit] Znamya 3

The Znamya 3 was intended to be a scaled-up version of the previous two Znamyas, with a diameter of 60-70 meters. It was never built, as the project was abandoned after the failure of the Znamya 2.5. [5]

[edit] References

  1. ^ McDowell, Jonathan (1993-02-10). Jonathan's Space Report - No 143 - Mir (HTML). Jonathan's Space Report. Jonathan McDowell. Retrieved on 2007-02-25.
  2. ^ Wade, Mark (pub date unknown). Mir EO-12 (HTML). Encyclopedia Astronautica. Mark Wade. Retrieved on 2007-02-25.
  3. ^ Wade, Mark (pub date unknown). Mir News 453: Znamya 2.5 (HTML). Encyclopedia Astronautica. Mark Wade. Retrieved on 2007-02-25.