Discoverer 34

Discoverer 34

Mission type	Optical reconnaissance
Operator	US Air Force/NRO
Harvard designation	1961 Alpha Epsilon 1
Spacecraft properties
Spacecraft type	KH-3 Corona'''
Bus	Agena-B
Manufacturer	Lockheed
Launch mass	1,150 kilograms (2,540 lb)
Start of mission
Launch date	5 November 1961, 20:00 UTC
Rocket	Thor DM-21 Agena-B 330
Launch site	Vandenberg LC-75-1-1
End of mission
Decay date	7 December 1962
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee	225 kilometers (140 mi)
Apogee	970 kilometers (600 mi)
Inclination	82.5 degrees
Period	96.6 minutes

The launch of Discoverer 34

Discoverer 34, also known as Corona 9027, was an American optical reconnaissance satellite which was launched in 1961. It was a KH-3 Corona''' satellite, based on an Agena-B.^[1]

The launch of Discoverer 34 occurred at 20:00 UTC on 5 November 1961. A Thor DM-21 Agena-B rocket was used, flying from Launch Complex 75-1-1 at the Vandenberg Air Force Base.^[2] Although the satellite achieved orbit, and was assigned the Harvard designation 1961 Alpha Epsilon 1, the launch was unsuccessful. An anomalous angle taken during ascent resulted in the spacecraft being placed into an unusable orbit.^[3] It was the second consecutive KH-3 launch failure; the previous mission, Discoverer 33, had failed to achieve orbit due to a separation failure.

Discoverer 34 was launched into a low Earth orbit, with a perigee of 225 kilometres (140 mi), an apogee of 970 kilometres (600 mi), 82.5 degrees of inclination, and a period of 96.6 minutes.^[4] 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).^[6] Images were to have been recorded onto 70-millimeter (2.8 in) film, and returned in a Satellite Recovery Vehicle. The Satellite Recovery Vehicle to be used by Discoverer 34 was SRV-553. Due to the launch failure, and a problem with a gas valve on the spacecraft, recovery of the SRV was not attempted.^[3] Discoverer 34 decayed from orbit on 7 December 1962.^[4]

References

1. Krebs, Gunter. "KH-3 Corona". Gunter's Space Page. Retrieved 30 June 2010.
2. McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 30 June 2010.
3. Lindborg, Christina; Pike, John (9 September 2000). "KH-3 Corona". Federation of American Scientists. Retrieved 30 June 2010.
4. McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 30 June 2010.
5. Wade, Mark. "KH-3". Encyclopedia Astronautica. Retrieved 30 June 2010.
6. "Corona". Mission and Spacecraft Library. NASA. Retrieved 30 June 2010.