Discoverer 22


Discoverer 22
Mission typeOptical reconnaissance
OperatorUS Air Force/NRO
Mission durationFailed to orbit
Spacecraft properties
Spacecraft typeCorona KH-2
Launch mass1,150 kilograms (2,540 lb)
Start of mission
Launch date30 March 1961, 20:34:43 (1961-03-30UTC20:34:43Z) UTC
RocketThor DM-21 Agena-B 300
Launch siteVandenberg LC-1 launch pad 75-3-4
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
The launch of Discoverer 22

Discoverer 22, also known as Corona 9015, was an American optical reconnaissance satellite which was lost in a launch failure in 1961. It was the fourth of ten Corona KH-2 satellites, based on the Agena-B.[1]

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 pad 75-3-4 at the Vandenberg Air Force Base.[2] Due to a malfunction of the rocket's second stage, it failed to achieve orbit.[3]

Discoverer 22 was to have operated in a low Earth orbit. It had a mass of 1,150 kilograms (2,540 lb),[4] 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).[5] Images were to have been recorded onto 70-millimeter (2.8 in) film, and returned in a Satellite Recovery Vehicle. The Satellite Recovery Vehicle carried aboard Discoverer 22 was SRV-509.[4]


  1. ^ Krebs, Gunter. "KH-2 Corona". Gunter's Space Page. Retrieved 23 October 2020.
  2. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 23 June 2010.
  3. ^ Pike, John (9 September 2000). "KH-2 Corona". Federation of American Scientists. Retrieved 23 June 2010.
  4. ^ a b Wade, Mark. "KH-2". Encyclopedia Astronautica. Archived from the original on 23 January 2013. Retrieved 23 June 2010.
  5. ^ "Corona". Mission and Spacecraft Library. NASA. Archived from the original on 3 October 2007. Retrieved 23 June 2010.