What is Pioneer 11?
{{Infobox spaceflight | name = ''Pioneer 11'' | image = An artist's impression of a Pioneer spacecraft on its way to interstellar space.jpg | image_caption = An artist's impression of a Pioneer spacecraft on its way to interstellar space. | mission_type = Planetary and heliosphere exploration | operator = [[NASA]] / [[Ames Research Center|ARC]] | website = [https://web.archive.org/web/20041105100336/http://spaceprojects.arc.nasa.gov/Space_Projects/pioneer/PNhome.html Pioneer Project website]<small>(archived)</small><br> [http://www.nasa.gov/mission_pages/pioneer/ NASA Archive page] | COSPAR_ID = 1973-019A | SATCAT = 6421 | mission_duration = 22&nbsp;years, 5&nbsp;months, 25&nbsp;days | spacecraft_type = | manufacturer = [[TRW Inc.|TRW]] | dry_mass = | launch_mass = {{convert|259|kg|lb}} | power = 155&nbsp;watts (at launch) | launch_date = {{start-date|April 6, 1973, 02:11:00|timezone=yes}}&nbsp;UTC | launch_rocket = {{nowrap|[[Atlas-Centaur|Atlas SLV-3D Centaur-D1A]] [[Star 37|Star-37E]]}} | launch_site = [[Cape Canaveral Air Force Station|Cape Canaveral]] [[Spaceport Florida Launch Complex 36|LC-36B]] | launch_contractor = | last_contact = {{end-date|September 30, 1995}} |interplanetary = {{Infobox spaceflight/IP |type = flyby |object = [[Jupiter]] |distance = {{convert|43000|km|mi|abbr=off|sp=us}} |arrival_date = December 3, 1974 }} {{Infobox spaceflight/IP |type = flyby |object = [[Saturn]] |distance = {{convert|21000|km|mi|abbr=off|sp=us}} |arrival_date = September 1, 1979 }} <!--mission insignia or patch--> | insignia = Pioneer 10 - Pioneer 11 - mission patch - Pioneer patch.png | insignia_caption = <!--image caption--> | insignia_alt = <!--image alt tex