Mission Type: Lander
Launch Vehicle: 8K78M (no. T15000-21)
Launch Site: NIIP-5 / launch site 1
Spacecraft Mass: c. 1,420 kg
Spacecraft Instruments: 1) imaging system and 2) radiation detector
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 fifth Soviet attempt at a lunar soft-landing. The mission was aborted early when during the ascent to Earth orbit, the launch vehicle's third-stage engine prematurely
A subsequent investigation indicated that the engine cut off due to loss of power when a circuit between a battery in the fourth stage (which powered the third-stage engine) and the I-100 guidance unit was broken.