The Sphinx satellite was the payload for the first Titan IIIE Centaur rocket.

However, the rocket did not reach Earth orbit[1] because the second stage failed to ignite, at which point the range safety officer ordered the rocket destroyed.

[2] The satellite was destroyed along with its support, the launched with the Viking Dynamic Simulator.

[1] SPHINX stood for Space Plasma High Voltage Interaction Experiment.

[1] It was designed to test high-voltage equipment in outer space.