Discoverer 28

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Discoverer 28
Mission type Optical reconnaissance
Operator US Air Force/NRO
Mission duration Failed to orbit
Spacecraft properties
Spacecraft type KH-2 Corona'
Bus Agena-B
Manufacturer Lockheed
Launch mass 1,150 kilograms (2,540 lb)
Start of mission
Launch date 4 August 1961, 00:01 (1961-08-04UTC00:01Z) UTC
Rocket Thor DM-21 Agena-B 309
Launch site Vandenberg LC-75-1-1
Orbital parameters
Reference system Geocentric
Regime Low Earth
Epoch Planned

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.[1]

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.[2] It failed to achieve orbit after the Agena's guidance and control system malfunctioned.[3][4]

Discoverer 28 was to have operated in a low Earth orbit. The satellite had a mass of 1,150 kilograms (2,540 lb),[5] 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).[4] 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 by Discoverer 28 was SRV-512.[5]

References

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