|Operator||US Air Force/NRO|
|Mission type||Optical reconnaissance|
|Launch date||30 March 1961
|Carrier rocket||Thor DM-21 Agena-B 300|
|Launch site||Vandenberg LC-75-3-4|
|Mission duration||Failed to orbit|
|Mass||1,150 kilograms (2,500 lb)|
|Regime||Low Earth (planned)|
The launch of Discoverer 22 occurred at 20:34:43 UTC on 30 March 1961. A Thor DM-21 Agena-B rocket was used, flying from Launch Complex 75-3-4 at the Vandenberg Air Force Base. Due to a malfunction of the rocket's second stage, it failed to achieve orbit.
Discoverer 22 was to have operated in a low Earth orbit. It had a mass of 1,150 kilograms (2,500 lb), and was equipped with a panoramic camera with a focal length of 61 centimetres (24 in), which had a maximum resolution of 7.6 metres (25 ft). Images were to have been recorded onto 70-millimetre (2.8 in) film, and returned in a Satellite Recovery Vehicle. The Satellite Recovery Vehicle carried aboard Discoverer 22 was SRV-509.
- Krebs, Gunter. "KH-2 Corona". Gunter's Space Page. Retrieved 23 June 2010.
- McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 23 June 2010.
- Pike, John (9 September 2000). "KH-2 Corona". Federation of American Scientists. Retrieved 23 June 2010.
- Wade, Mark. "KH-2". Encyclopedia Astronautica. Retrieved 23 June 2010.
- "Corona". Mission and Spacecraft Library. NASA. Retrieved 23 June 2010.
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