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Unnamed Zond 3MV-1/4
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Kosmos 27
Kosmos 27 Mission to Venus

Mission Type: Impact
Launch Vehicle: 8K78 (no. T15000-22)
Launch Site: Tyuratam (Baikonur Cosmodrome), U.S.S.R, NIIP-5 / launch site 1
Spacecraft Mass: 948 kg
Spacecraft Instruments:
Bus: 1) radiation detector; 2) charged-particle detector; 3) magnetometer; 4) piezoelectric detector and 5) atomic hydrogen detector
Lander: 1) barometer; 2) thermometer; 3) radiation detector; 4) micro-organism detection experiment; 5) atmospheric composition experiment; 6) acidity measurement experiment; 7) electro-conductivity experiment and 8) luminosity experiment
References:
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, http://nssdc.gsfc.nasa.gov/


The probe, designed to accomplish atmospheric entry into Venus, successfully reached Earth orbit but failed to leave for Venus when the Blok L upper stage malfunctioned. The upper stage evidently lost stable attitude due to a failure in the circuit of the power supply for the attitude-control system.

The spacecraft burned up in Earth's atmosphere the following day. Had this mission been successful, it would probably have been given a Zond designation.


Key Dates
27 Mar 1964:  Launch
28 Mar 1964:  End of Venus Mission
Status: Unsuccessful
Fast Facts
Kosmos 27 Facts This spacecraft most likely would have been given a Zond designation had it succeeded.

Zond means probe in Russian.

The probe was given a Kosmos designation reserved for Earth-orbiting missions. It was a common Soviet practive to disguise the probe's true destination.
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Last Updated: 29 Nov 2010