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Unnamed Luna Ye-8-5/404
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Kosmos 305
Kosmos 305 Mission to Earth's Moon

Mission Type: Sample Return
Launch Vehicle: Proton booster plus upper stage and escape stages, 8K82K + Blok D (Proton no. 244-01)
Launch Site: Tyuratam (Baikonur Cosmodrome), USSR, NIIP-5 / launch site 81P
Spacecraft Mass: c. 5,700 kg
Spacecraft Instruments: 1) stereo imaging system, 2) remote arm for sample collection and 3) radiation detector
Spacecraft Dimensions: Four spherical fuel tanks and nozzles, thrusters, and landing legs set in a 4-meter-wide base.
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/

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


Exactly one lunar month after the failure of Kosmos 300, the Soviets launched another Ye-8-5 lunar sample-return spacecraft. Once again, the spacecraft failed to leave Earth orbit.

When the Blok D upper stage was meant to fire for translunar injection, telemetry readings went off-scale and communications were lost. There had apparently been a programming failure in one of the radio-command blocks designed to command the Blok D to fire.

The Soviet press merely referred to the probe as Kosmos 305. The spacecraft's orbit decayed over Australia before the craft completed a single orbit of Earth.


Key Dates
22 Oct 1969:  Launch
Status: Unsuccessful
Fast Facts
Kosmos 305 Facts Fourth Soviet attempt to return samples from the Moon.

A programming error is believe to have led to a loss of communications and the booster rocket to carry the spacecraft out of Earth orbit never fired.

The Soviets renamed it as part of the Kosmos series of Earth-orbiting missions to disguise its true purpose to visit the Moon.
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Last Updated: 29 Nov 2010