Launch Date February 19, 1964
Launch Site Baikonur Cosmodrome, Kazakhstan, Russia | Launch Site 1
Destination Venus
Type Flyby
Status Unsuccessful
Nation Soviet Union
Alternate Names


Study Venus during a flyby mission.


None. The rocket carrying the spacecraft into space exploded before it reached orbit.

Key Dates

Feb. 19, 1964: Launch

In Depth

This was another Soviet "third generation" deep space probe that failed to accomplish its mission of a Venus flyby.

This spacecraft failed to reach Earth orbit due to a malfunction in the launch vehicle's third stage. Later investigation indicated that a liquid oxygen leak through an unpressurized valve seal froze propellant in the main pipeline. As a result, the pipeline cracked, leading to an explosion in the third stage.


Launch Vehicle: 8K78 (no. T15000-19)

Spacecraft Mass: c. 800 kilograms

Spacecraft Instruments:

  1. radiation detector
  2. charged-particle detector
  3. magnetometer
  4. piezoelectric detector
  5. atomic hydrogen detector
  6. radio telescope
  7. ultraviolet and Roentgen solar radiation experiment
  8. technology experiment
  9. plasma engines

Selected References

Siddiqi, Asif A. Deep Space Chronicle: A Chronology of Deep Space and Planetary Probes 1958-2000, NASA, 2002.

Related News