Editing Proton (satellite program) (section)

===Proton 3===

[[File:Gt11fig3a.gif|thumb|150px|alt=Proton 3 as seen from [[Gemini 11]], 13 September 1966|Proton 3 as seen from Gemini 11, 13 September 1966<ref name=macc>{{cite web|url=http://www.brumac.mysite.com/Gemini_11/GEMINI_11.html|title=Gemini 11 UFO|author=Bruce S. Maccabee|date=August 2000}}</ref>]]

After an unsuccessful launch of the third test UR-500 on 24 March 1966 14:39&nbsp;UTC, Proton 3 was successfully launched into Earth orbit from Baikonur Cosmodrome Site 81/23 on 6 July 1966 12:57&nbsp;UTC<ref name=log/> on the fourth and final UR-500 test flight<ref name=astro/> and began searching for quarks and other elementary particles of fractional electron charge.<ref name=sov/> The satellite returned data for most, if not all, of its short time in orbit,<ref name="aa1966">{{cite web|url=https://history.nasa.gov/AAchronologies/1966.pdf|title=Aeronautics and Astronautics, 1966|publisher=NASA|page=285|access-date=26 August 2021}}</ref> reentering Earth's atmosphere on 16 September 1966.<ref name=cat/> Shortly before reentry, Proton 3 was observed tumbling once per second over the [[Indian Ocean]] by the crew of [[Gemini 11]].<ref name=avweek1966>{{cite magazine| date = 19 September 1966| title = Gemini 11 Demonstrates Pilot Capabilities| url = http://archive.aviationweek.com/issue/19660919#!&pid=26| magazine = Aviation Week and Space Technology| location = New York| publisher = McGraw Hill Publishing Company|page=27|access-date = 25 August 2021|url-access=subscription}}</ref>