| DISCOVERER 34 | |
| Names List: | CORONA 9027 DISCOVERER XXXIV |
| Mission Type: | Optical reconnaissance |
| Operator: | U.S. Air Force / NRO |
| Harvard Designation: | 1961 Alpha Epsilon 1 |
| Cospar Id: | 1961-029A |
| Satcat: | 00197 |
| Spacecraft: | DISCOVERER XXXIV |
| Spacecraft Type: | CORONA KH-2 |
| Spacecraft Bus: | Agena B |
| Manufacturer: | Lockheed Corporation |
| Launch Date: | 5 November 1961, 20:00:30 GMT |
| Launch Rocket: | Thor-Agena B (Thor 330 / Agena 1117) |
| Launch Site: | Vandenberg, LC-75-1-1 |
| Launch Contractor: | Douglas Aircraft Company / Lockheed Corporation |
| Entered Service: | 5 November 1961 |
| Decay Date: | 7 December 1962 |
| Landing Date: | SRV 553 |
| Landing Site: | Not attempted |
| Orbit Reference: | Geocentric orbit |
| Orbit Regime: | Low Earth orbit |
| Orbit Inclination: | 82.70° |
| Orbit Period: | 97.20 minutes |
| Apsis: | gee |
| Programme: | DISCOVERER |
| Previous Mission: | Discoverer 33 |
| Next Mission: | Discoverer 35 |
| Programme2: | CORONA KH-2 |
| Previous Mission2: | CORONA 9026 |
| Next Mission2: | CORONA 9028 |
DISCOVERE 34, also known as CORONA 9027, was a United States optical reconnaissance satellite which was launched on 5 November 1961. It was the ninth of ten CORONA KH-2 satellites, based on the Agena B.[1]
The launch of DISCOVERER 34 occurred at 20:00:30 GMT on 5 November 1961.[2] A Thor-Agena B launch vehicle 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-2 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, an apogee of, 82.7° of inclination, and a period of 97.20 minutes.[4] The satellite had a mass of,[5] and was equipped with a panoramic camera with a focal length of, which had a maximum resolution of .[6] Images were to have been recorded onto film, and returned in a Satellite Recovery Vehicle (SRV). 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]