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- Luna_18 abstract "Luna 18 (Ye-8-5 series) was an unmanned space mission of the Luna program, also called Lunik 18.[citation needed]Luna 18 was placed in an earth parking orbit after it was launched and was then sent towards the Moon. On 7 September 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 11 September 1971, at 3 degrees 34 minutes N, 56 degrees 30 minutes E (selenographic coordinates) in a rugged mountainous terrain. Signals ceased at the moment of impact.This mission was the seventh Soviet attempt to recover soil samples from the surface of the Moon and the first after the success of Luna 16. After two mid-course corrections on 4 September and 6 September 1971, Luna 18 entered a circular orbit around the Moon on 7 September at 100 kilometers altitude with an inclination of 35°. After several more orbital corrections, on 11 September, the vehicle began its descent to the lunar surface. Unfortunately, contact with the spacecraft was abruptly lost at 07:48 UT at the previously determined point of lunar landing. Impact coordinates were 3°34' north latitude and 56°30' east longitude, near the edge of the Mare Fecunditatis ("Sea of Fertility"). Officially, the Soviets announced that "the lunar landing in the complex mountainous conditions proved to be unfavorable." Later, in 1975, the Soviets published data from Luna 18's continuous-wave radio altimeter that determined the mean density of the lunar topsoil.Launch Date/Time: 1971-09-02 at 13:40:40 UTCOn-orbit dry mass: 5600 kg".
- Luna_18 thumbnail Luna-16.jpg?width=300.
- Luna_18 wikiPageExternalLink spacecraftDisplay.do?id=1971-073A.
- Luna_18 wikiPageExternalLink Luna.php.
- Luna_18 wikiPageID "99168".
- Luna_18 wikiPageRevisionID "601318345".
- Luna_18 carrierRocket Blok_D.
- Luna_18 carrierRocket Proton-K.
- Luna_18 cosparId "1971".
- Luna_18 eccentricity "0.001361".
- Luna_18 hasPhotoCollection Luna_18.
- Luna_18 inclination "35".
- Luna_18 launchDate "--09-02".
- Luna_18 launchSite Baikonur_Cosmodrome.
- Luna_18 mainInstruments "Radiation detector".
- Luna_18 mainInstruments "Radio altimeter".
- Luna_18 mainInstruments "Remote arm for sample collection".
- Luna_18 mainInstruments "Stereo photographic imaging system".
- Luna_18 majorContractors Lavochkin.
- Luna_18 missionDuration "777600.0".
- Luna_18 missionType "Planetary Science Lunar Sample Return".
- Luna_18 name "Luna 18".
- Luna_18 nolink "y".
- Luna_18 orbitalInsertionDate "1971-09-07".
- Luna_18 orbitalPeriod "7140.0".
- Luna_18 orbits "~48".
- Luna_18 organisation Soviet_Union.
- Luna_18 planet Moon.
- Luna_18 planetCoords "3".
- Luna_18 planetLanding "--09-11".
- Luna_18 refs spacecraftDisplay.do?id=1971-073A.
- Luna_18 satelliteOf Moon.
- Luna_18 subject Category:1971_in_spaceflight.
- Luna_18 subject Category:1971_in_the_Soviet_Union.
- Luna_18 subject Category:Exploration_of_the_Moon.
- Luna_18 subject Category:Luna_program.
- Luna_18 subject Category:Missions_to_the_Moon.
- Luna_18 subject Category:Sample_return_missions.
- Luna_18 subject Category:Spacecraft_launched_in_1971.
- Luna_18 subject Category:Spacecraft_that_impacted_the_Moon.
- Luna_18 subject Category:Spacecraft_that_orbited_Moon.
- Luna_18 type MeanOfTransportation.
- Luna_18 type Spacecraft.
- Luna_18 type DesignedArtifact.
- Luna_18 comment "Luna 18 (Ye-8-5 series) was an unmanned space mission of the Luna program, also called Lunik 18.[citation needed]Luna 18 was placed in an earth parking orbit after it was launched and was then sent towards the Moon. On 7 September 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.".
- Luna_18 label "Loena 18".
- Luna_18 label "Luna 18".
- Luna_18 label "Luna 18".
- Luna_18 label "Luna 18".
- Luna_18 label "Łuna 18".
- Luna_18 label "Луна-18".
- Luna_18 label "ルナ18号".
- Luna_18 label "月球18号".
- Luna_18 sameAs Luna_18.
- Luna_18 sameAs Luna_18.
- Luna_18 sameAs Luna_18.
- Luna_18 sameAs ルナ18号.
- Luna_18 sameAs Loena_18.
- Luna_18 sameAs Łuna_18.
- Luna_18 sameAs Luna_18.
- Luna_18 sameAs m.0pbbr.
- Luna_18 sameAs Q668942.
- Luna_18 sameAs Q668942.
- Luna_18 wasDerivedFrom Luna_18?oldid=601318345.
- Luna_18 depiction Luna-16.jpg.
- Luna_18 isPrimaryTopicOf Luna_18.
- Luna_18 name "Luna 18".