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Kosmos 359
Kosmos 359 Mission to Venus

Mission Type: Lander
Launch Vehicle: Modified SS-6 (Sapwood) with second-generation upper stage + escape stage; 8K78M
Launch Site: Tyuratam (Baikonur Cosmodrome); NIIP-5 / launch site 31
Spacecraft Mass: c. 1,200 kg
Spacecraft Instruments:
Bus: 1) solar wind detector 2) cosmic-ray detector Lander: 1) resistance thermometer 2) aneroid barometer
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,

Solar System Log by Andrew Wilson, published 1987 by Jane's Publishing Co. Ltd.

This was the second of a pair of probes designed to land on Venus and transmit information back to Earth. In this case, after the spacecraft reached Earth orbit, the main engine of the Blok L upper stage was late in igniting and cut off early (after only 25 seconds) due to incorrect operation of a sequencer and a failure in the power-supply system's DC transformer.

The payload remained stranded in orbit, eventually reentering Earth's atmosphere on 6 November 1970. The spacecraft was named Kosmos 359 by the Soviet press to disguise the failure.

Key Dates
22 Aug 1970:  Launch
6 Nov 1970:  End of Venus Mission
Status: Unsuccessful
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Last Updated: 6 Dec 2010