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Ye-8-5M/412
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Ye-8-5M/412
Ye-8-5M/412 Mission to Earth's Moon

Mission Type: Lander, Sample Return
Launch Vehicle: 8K82K + Blok D (Proton-K no. 287-02)
Launch Site: NIIP-5 / launch site 81L
Spacecraft Mass: About 5,800 kg
Spacecraft Instruments: 1) stereo imaging system; 2) improved drill for sample collection; 3) radiation detector and 4) radio-altimeter
References:
Deep Space Chronicle: A Chronology of Deep Space and Planetary Probes 1958-2000, Monographs in Aerospace History No. 24, by Asif A. Siddiqi


This was the second attempt by the Soviet Union to send an advanced lunar sample return craft to the Moon, equipped with the capability to dig for a deeper core. The first spacecraft (Luna 23) was damaged during landing on the Moon in October 1974.

On this mission, the first three stages of the Proton-K launch vehicle worked without fault, but the Blok D stage, during its first burn for insertion into Earth orbit, failed. The expensive payload burned up in Earth's atmosphere without ever reaching Earth orbit.


Key Dates
16 Oct 1975:  Launch
Status: Unsuccessful
Fast Facts
Ye-8-5M/412 Facts This mission was equipped with an improved drill that would bore deeper into the Moon's surface to collect samples.

The previous mission - Luna 23 - was damaged when it landed on the Moon.

A failure of the final booster rocket staged doomed this mission.
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Last Updated: 2 Dec 2010