Editing Luna 5 (section)

==Failure==
[[File:Moon map Smart 1 Ranger 9 Luna 5 Surveyor 7 Apollo 14.png|thumbnail|left|First announced location of the ''Luna 5'' impact (lower right), in relation to other lunar probes and landing sites.]]
Following the mid-course correction on 10 May, the spacecraft began spinning around its main axis due to a problem in a flotation gyroscope in the I-100 guidance system unit. A subsequent attempt to fire the main engine failed because of ground control error, and the engine never fired. As a result of these failures, the soft landing attempt failed, and ''Luna 5'' impacted the Moon.<ref>{{cite web|url=https://moonregistry.forallmoonkind.org/apollo-10-crewed-lunar-orbit-3-2-2-2-4/|title=Moonkind Lunar Registry – Luna-5|access-date=January 10, 2023}}</ref> The place of impact was first announced as {{Lunar coords and quad cat|31|S|8|W}} (coast of [[Mare Nubium]]), but later it was estimated as {{Lunar coords and quad cat|8|N|23|W}} (near crater [[Copernicus (lunar crater)|Copernicus]]).<ref name=NSSDC/> It was the second Soviet spacecraft to reach the surface of the Moon, following ''[[Luna 2]]'' in 1959. The [[Georgian National Astrophysical Observatory|Abastumani Astrophysical Observatory]] registered television images of the failed landing noted that shown it produced a {{convert|220|by|80|km|mi|adj=on}} plume which was visible for ten minutes.<ref name="moon">{{cite journal|url=https://ui.adsabs.harvard.edu/abs/2018CosRe..56..276K/abstract|title=Luna-5 (1965): Some Results of a Failed Mission to the Moon|last1=Ksanfomality |first1=L. V.|journal=Cosmic Research|volume=56|number=4|pages=276–282|date=July 2018|doi=10.1134/S0010952518040020 |bibcode=2018CosRe..56..276K |s2cid=254420064 |access-date=January 10, 2023}}</ref> A 2017 analysis of the reprocessed images allowed to refine the impact coordinates, provide an altitude estimate of 3.7−3.9 km for the generated gas cloud and corroborate estimations published for the 2009 [[LCROSS]] impact.<ref name="moon"/>