Pioneer 11 (also known as Pioneer G) was a NASA space probe the second mission to visit Jupiter and the first mission to visit Saturn. The space probe was launched on April 5, 1973 and flew by Jupiter on December 2, 1974 and Saturn on September 1, 1979.
In 1983, Pioneer 11 was predicted to be surpassed by Voyager 1 in the distace to the Sun and later by Voyager 2 around March 1988.
The probe was last heard on November 24, 1995 when the last communication between Earth and the probe ended due to power limitation and vast diatance, when it was 44.1 AU (4.1 billion miles or 7.5 billion km) from Earth.
By Nov. 5, 2017, Pioneer 11 was estimated to be about 97.590 AU (9.1 billion miles or 14.599 billion kilometers) from Earth
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.
By 2027, it'll be predicted to be exited the heliosphere and entered the interstellar space.