Pioneer 11

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Pioneer 11
An artist's impression of a Pioneer spacecraft on its way to interstellar space.jpg
An artist's impression of a Pioneer spacecraft on its way to interstellar space.
Mission typePlanetary and heliosphere exploration
OperatorNASA / ARC
COSPAR ID1973-019A
SATCAT no.6421
WebsitePioneer Project website(archived)
NASA Archive page
Mission duration22 years, 5 months, 25 days
Spacecraft properties
ManufacturerTRW
Launch mass259 kilograms (571 lb)
Power155 watts (at launch)
Start of mission
Launch dateApril 6, 1973, 02:11:00 (1973-04-06UTC02:11Z) UTC
RocketAtlas SLV-3D Centaur-D1A Star-37E
Launch siteCape Canaveral LC-36B
End of mission
Last contactSeptember 30, 1995 (1995-10-01)
Flyby of Jupiter
Closest approachDecember 3, 1974
Distance43,000 kilometers (27,000 miles)
Flyby of Saturn
Closest approachSeptember 1, 1979
Distance21,000 kilometers (13,000 miles)
Pioneer 10 - Pioneer 11 - mission patch - Pioneer patch.png

Pioneer 11 (also known as Pioneer G) was the second mission to visit Jupiter and the first mission to visit Saturn. The spacecraft was launched on April 6, 1973 and flew by Jupiter on December 4, 1974 and Saturn on September 1, 1979. The probe was last heard from November 1995 when the last communication between Earth and the probe ended.

Both Pioneer 10 and Pioneer 11 had plaques etched in gold. The plaques were designed by a team lead by Carl Sagan to communicate with extraterrestrial life should the spacecraft come into contact with it.

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