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Luna 7

1965 crewless Soviet space probe

Field	Value
name	Luna 7
image	Moon map Luna 17 Luna 2 Apollo 15 Surveyor 6 Surveyor 4 Luna 7 Luna 8 Luna 11.png
image_caption	Lunar map showing the location of Luna 7 in relation to other rovers and landing sites. Lower left, on top of the scale bar
mission_type	Lunar lander
operator	Soviet space program
COSPAR_ID	1965-077A
mission_duration	3 days
spacecraft_type	Ye-6
manufacturer	OKB-1
launch_mass	1504 kg
launch_date	UTC
launch_rocket	Molniya-M 8K78M
launch_site	Baikonur 1/5
orbit_reference
type	lander_impact
object	Lunar
arrival_date	UTC
location
programme	Luna programme
previous_mission	Luna 6
next_mission	Luna 8

Luna 7 (E-6 or Ye-6 series) was an uncrewed space mission of the Soviet Luna program, also called Lunik 7.

Mission

The Luna 7 spacecraft was intended to achieve a soft landing on the Moon. However, due to premature retrofire and cutoff of the retrorockets, the spacecraft impacted the lunar surface in Oceanus Procellarum. Unlike its predecessors, Luna 7 successfully carried out its mid-course correction on October 5 on the way to the Moon, in anticipation of a soft-landing two days later. However, immediately prior to planned retro-fire during the approach to the lunar surface, the spacecraft suddenly lost attitude control and failed to regain it. Automatic programmed systems then prevented the main engine from firing. As controllers observed helplessly, Luna 7 plummeted to the lunar surface at a very high speed, crashing at 22:08:24 UT on October 7, 1965, west of the Kepler crater, relatively near the actual intended target. Impact coordinates were .

Later investigation indicated that the optical sensor of the astronavigation system had been set at the wrong angle and had lost sight of Earth during the critical attitude-control maneuver. It was the tenth consecutive failure in the Ye-6 program.

References

"NASA - NSSDCA - Spacecraft - Details".
"NASA - NSSDCA - Spacecraft - Telemetry Details".
"Lodi News-Sentinel". Lodi News-Sentinel.
"The Day". The Day.
"L'Artisan". L'Artisan.
"Table of Anthropogenic Impacts and Spacecraft on the Moon".
Harvey, Brian. (August 17, 2007). "Soviet and Russian Lunar Exploration". Springer Science & Business Media.

Info: Wikipedia Source

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