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astronautix.com Luna Ye-8-5

Ye-8 lunar probe
Ye-8 lunar probe - Ye-8 lunar sample return spacecraft - detail of drill and reentry vehicle

Credit: © Mark Wade. 25,335 bytes. 313 x 440 pixels.



Manufacturer's Designation: Ye-8-5. Class: Planetary. Type: Lunar. Nation: USSR. Manufacturer: Lavochkin.

Unmanned lunar soil sample return.


Specification

Total Mass: 5,600 kg.


Luna Ye-8-5 Chronology


14 June 1969 Ye-8-5 VA Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. FAILURE: Failure.
13 July 1969 Luna 15 Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. Mass: 5,600 kg. Perigee: 240 km. Apogee: 870 km. Inclination: 126.0 deg.

Unmanned soil return mission launched coincident with Apollo 11 mission in last ditch attempt to return lunar soil to earth before United States. After completing 86 communications sessions and 52 orbits of the Moon at various inclinations and altitudes, crashed on the moon on 20 July in an attempted landing. Altitude data used in programming inaccurate or guidance system unable to cope with effect of lunar mascons.
Officially: Testing of on-board systems of the automatic station and further scientific investigation of the moon and circumlunar space. Parameters are for lunar orbit.


23 September 1969 Cosmos 300 Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. FAILURE: Block D lost LOX due to valve defect. Mass: 5,600 kg. Perigee: 184 km. Apogee: 189 km. Inclination: 51.5 deg.

Robotic lunar soil return mission. Failed to leave low earth orbit due to Block D stage failure.


22 October 1969 Cosmos 305 Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. FAILURE: Block D control system failure. Mass: 5,600 kg. Perigee: 182 km. Apogee: 208 km. Inclination: 51.4 deg.

Robotic lunar soil return mission. Failed to leave low earth orbit due to Block D stage failure.


06 February 1970 Ye-8-5 s/n 405 Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. FAILURE: Failure of vehicle on launch. Mass: 5,600 kg.

Robotic lunar soil return mission. Launch vehicle failure.


12 September 1970 Luna 16 Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. Mass: 5,600 kg. Perigee: 110 km. Apogee: 110 km. Inclination: 70.0 deg.

Lunar Sample Return. Landed on Moon 20 September 1970 at 05:18:00 GMT, Latitude 0.68 S, Longitude 56.30 E - Mare Fecunditatis. Luna 16 was launched toward the Moon from a preliminary earth orbit and entered a lunar orbit on September 17, 1970. On September 20, the spacecraft soft landed on the lunar surface as planned. The spacecraft was equipped with an extendable arm with a drilling rig for the collection of a lunar soil sample. After 26 hours and 25 minutes on the lunar surface, the ascent stage, with a hermetically sealed soil sample container, left the lunar surface carrying 100 grams of collected material. It landed in the Soviet Union on September 24, 1970. The lower stage of Luna 16 remained on the lunar surface and continued transmission of lunar temperature and radiation data. Parameters are for lunar orbit.



Luna 17Luna 17

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02 September 1971 Luna 18 Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. Mass: 5,600 kg. Perigee: 100 km. Apogee: 100 km. Inclination: 35.0 deg.

Attempted lunar soil return mission; crashed while attempting to soft land at Latitude 3.57 N, Longitude 50.50 E - Mare Fecunditatis. Luna 18 used a new method of navigation in lunar orbit and for landing. The spacecraft's designer, Babakhin, had died at age 56 only the month before. Luna 18 successfully reached earth parking orbit before being put on a translunar trajectory. On September 7, 1971, it entered lunar orbit. The spacecraft completed 85 communications sessions and 54 lunar orbits before it was sent towards the lunar surface by use of braking rockets. It impacted the Moon on September 11, 1971, in a rugged mountainous terrain. Signals ceased at the moment of impact. Parameters are for lunar orbit.


14 February 1972 Luna 20 Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. Mass: 5,600 kg. Perigee: 100 km. Apogee: 100 km. Inclination: 65.0 deg.


Ye-8 Lunar LanderYe-8 Lunar Lander - Ye-8 robot lunar soil return spacecraft.

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Soft landed on Moon; returned soil samples to Earth. Landed on Moon 21 February 1972 at 19:19:00 GMT, Latitude 3.57 N, Longitude 56.50 E - Mare Fecunditatis. Luna 20 was placed in an intermediate earth parking orbit and from this orbit was sent towards the Moon. It entered lunar orbit on February 18, 1972. On 21 February 1972, Luna 20 soft landed on the Moon in a mountainous area known as the Apollonius highlands, 120 km from where Luna 18 had crashed. While on the lunar surface, the panoramic television system was operated. Lunar samples were obtained by means of an extendable drilling apparatus. The ascent stage of Luna 20 was launched from the lunar surface on 22 February 1972 carrying 30 grams of collected lunar samples in a sealed capsule. It landed in the Soviet Union on 25 February 1972. The lunar samples were recovered the following day.
16 October 1975 Ye-8-5M VA Program: Luna. Launch Site: Baikonur . Launch Vehicle: Proton 8K82K / 11S824. FAILURE: Failure.

Ye-8 OKB-1 RoverYe-8 OKB-1 Rover - Ye-8 Lunokhod lunar rover - as designed by Korolev OKB-1 before project was handed over to Lavochkin.

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Last update 12 March 2001.
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© Mark Wade, 2001 .