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2MV-1/2 Mission to Venus

Mission Type: Impact
Launch Vehicle: 8K78 (no. T103-13)
Launch Site: NIIP-5 / launch site 1
Spacecraft Mass: c. 1,100 kg
Spacecraft Instruments: Unknown
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,

This was the second of three Venus spacecraft launched by the Soviets in 1962.

Like its predecessor launched in August 1962 (also a Venus impact probe), the spacecraft never left parking orbit around Earth because of a malfunction in the Blok L upper stage designed to send the probe out of Earth orbit toward Venus.

Evidently, the valve that controlled the delivery of fuel into the combustion chamber of the Blok L engine (the S1.5400) never opened. As a result, the engine never fired. The payload decayed within five days of launch.

Key Dates
1 Sep 1962:  Launch
Status: Unsuccessful
Fast Facts
2MV-1/2 Facts This was the Soviet Union's 15th interplanetary mission.

Only three of the 11 interplanetary missions launched by both nations in 1962 were successful. Of those, only Mariner 2 was a complete success.

On this mission, the final stage failed to fire and send it from Earth orbit to Venus.
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Last Updated: 23 Nov 2010