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Solar System Exploration
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Pioneer-E Mission to Our Solar System

Goals: This was the fifth and last (following Pioneers 6, 7, 8, and 9) of a series of solar orbiters intended to study, from widely separated points in space on a continuing basis, interplanetary phenomena such as the Sun's magnetic field, the solar wind, and solar and galactic cosmic rays.

Accomplishments: None. Failure of the booster's first stage caused the launch vehicle to veer off course. Ground control destroyed the rocket about seven minutes into the flight, before Earth orbit could be achieved.

Key Dates
27 Aug 1969:  Launch (15:59 UT)
Status: Unsuccessful
Fast Facts
Pioneer-E Facts The first stage lost hydraulic pressure shortly in to the flight.

Deep Space Chronicle: A Chronology of Deep Space and Planetary Probes 1958-2000, Monographs in Aerospace History No. 24, by Asif A. Siddiqi

National Space Science Data Center,

The TETR satellite designed to test the Apollo ground tracking network also was lost.
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Last Updated: 1 Dec 2010