21 jul 1973 año - Mars 4 Failed Mars orbiter attempt (successful as a flyby) (USSR)

Descripción:

The microchip problem caused the failure of the Mars 4 orbiter to fire its orbit insertion rockets. It flew by Mars at a distance of 2,200 kilometers (1,370 miles), taking one set of images and collecting limited data. It continued to function after the flyby, returning data from solar orbit.

https://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1973-047A