Discoverer 28, also known as Corona 9021, was an American optical reconnaissance satellite which was lost in a launch failure in 1961. It was the last KH-2 Corona' satellite, which was based on an Agena-B.
The launch of Discoverer 28 occurred at 00:01 UTC on 4 August 1961. A Thor DM-21 Agena-B rocket was used, flying from Launch Complex 75-1-1 at the Vandenberg Air Force Base. It failed to achieve orbit after the Agena's guidance and control system malfunctioned.
Discoverer 28 was to have operated in a low Earth orbit. The satellite had a mass of 1,150 kilograms (Template:Convert/round lb), and was equipped with a panoramic camera with a focal length of 61 centimetres (Template:Convert/round in), which had a maximum resolution of 7.6 metres (Template:Convert/round ft). Images were to have been recorded onto 70-millimeter (Template:Convert/LoffAonSon) film, and returned in a Satellite Recovery Vehicle. The Satellite Recovery Vehicle carried by Discoverer 28 was SRV-512.
- ↑ Krebs, Gunter. "KH-2 Corona". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/kh-2.htm. Retrieved 26 June 2010.
- ↑ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. http://planet4589.org/space/log/launchlog.txt. Retrieved 26 June 2010.
- ↑ Pike, John (9 September 2000). "KH-2 Corona". Federation of American Scientists. http://www.fas.org/spp/military/program/imint/kh-2.htm. Retrieved 23 June 2010.
- ↑ 4.0 4.1 "Corona". Mission and Spacecraft Library. NASA. http://msl.jpl.nasa.gov/programs/corona.html. Retrieved 26 June 2010.
- ↑ 5.0 5.1 Wade, Mark. "KH-2". Encyclopedia Astronautica. http://www.astronautix.com/craft/kh2.htm. Retrieved 26 June 2010.
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