Prospector arose as a result of PresidentJohn F. Kennedy's desire to rehabilitate the tarnished image of US spaceflight. In 1961,NASA proposed a series of robotic probes, including Prospector, to be managed by theJet Propulsion Laboratory.[2]
Prospector was based on a study that had been performed by theMarshall Space Flight Center in June 1960, to determine what lunar missions could be achieved using theSaturn I rocket.
NASA envisioned Prospector as "a large versatile 'space truck'"[3] that could be launched by aSaturn rocket and that could soft-land on the Moon with a wide variety of payloads. Among the applications envisioned were:[3]
A remote-controlled lunar rover that could explore large areas of the lunar surface, including thefar side of the Moon[2]
A system to obtainlunar samples and return them to Earth
A low-altitude survey of the lunar surface for reconnaissance, and to help select landing sites for subsequent Apollo missions, using large propellant tanks to allow the spacecraft to hover and laterally move over the lunar surface
An uncrewedcargo spacecraft, providing supplies and materials to lunar astronauts
Prospector was initially planned to have its first launch between 1963 and 1966.[4] However, as plans progressed, the project ran into weight overruns, requiring a larger launcher such as theSaturn V.[2] Its role also began to change from one of support for the Apollo missions to more of a substitute for them,[2] which NASA'sSpace Task Group did not endorse.[5] The project was canceled in 1962.[2]
^"The Apollo Spacecraft - A Chronology".NASA Special Publication-4009. NASA. RetrievedMarch 20, 2012. Volume 1, Part 2(c), citing Memorandum, H. Kurt Strass, Apollo Project Office, to Associate Director, STG,Conference at NASA Headquarters Concerning Relationship Between the Prospector and Apollo Programs, April 20, 1961, May 1, 1961.