Encyclopedia Astronautica
Apollo 20


Crew: Roosa, Lind, Lousma. Apollo 20 was originally planned in July 1969 to land in Crater Copernicus, a spectacular large crater impact area. Later Copernicus was assigned to Apollo 19, and the preferred landing site for Apollo 20 was the Marius Hills or Tycho.

Apollo 20 was originally planned in July 1969 to land in Crater Copernicus, a spectacular large crater impact area. Later Copernicus was assigned to Apollo 19, and the preferred landing site for Apollo 20 was the Marius Hills, or, if the operational constraints were relaxed, the bright crater Tycho. The planned December 1972 flight was cancelled on January 4, 1970, before any crew assignments were made. Work was stopped on LM-14; CSM-115A was studied for use on a second Skylab mission; Saturn V 515 was earmarked for use on Skylab. The remaining Apollo missions were stretched out to six-month intervals, which would have placed the Apollo 20 flight in 1974 had it not been cancelled. No crew was formally selected. In the normal three-mission-ahead crew rotation, a Conrad-Weitz-Lousma would have been named. Instead they were transferred to the Skylab program. At one time it was considered possible that Mitchell would command the crew in place of Conrad. But it has also been stated that since both Conrad and Mitchell had been on the lunar surface, Stuart Roosa would have been commander. Astronaut Lind was considered by Slayton as next in line for a chance to land as lunar module pilot. So the most likely crew would have been Roosa (Commander); Lind (Lunar Module Pilot); and Lousma (Command Module Pilot).

First Launch: 1974 July.

More... - Chronology...


Associated People
  • Lind Lind, Dr Don Leslie (1930-) American physicist mission specialist astronaut. Flew on STS-51-B. Longest wait for an American for a spaceflight after becoming an astronaut (19 years). More...
  • Roosa Roosa, Stuart Allen 'Stu' (1933-1994) American test pilot astronaut. Flew on Apollo 14. Died of viral pneumonia, a complication of pancreatitis. More...
  • Lousma Lousma, Jack Robert (1936-) American pilot astronaut. Flew on Skylab 3, STS-3. More...

Associated Countries
See also
Associated Programs
  • Apollo The successful US project to land a man on the moon. More...

Apollo 20 Chronology


1965 December 15 - .
  • Proposal for four additional Apollo LEMs - . Nation: USA. Program: Apollo. Flight: Apollo 20. Spacecraft: Apollo LM. Grumman was invited to provide NASA with a cost-plus-incentive-fee proposal to provide four LEMs subsequent to LEM-11, with the proposal due at MSC by the close of business on the following day. The proposal should be based on a vehicular configuration similar to LEM-11 in all respects, including supporting activities, contractual provisions, and specifications applicable to LEM-11. The required shipment dates for the four vehicles would be December 13, 1968, February 11, 1969, April 11, 1969, and June 10, 1969, respectively.

1969 June 11 - .
  • Task force for Apollo hardware development - . Nation: USA. Related Persons: Phillips, Samuel. Program: Apollo. Flight: Apollo 20. Spacecraft: Apollo LM. Summary: In establishing a task force for hardware development, Apollo Program Director Samuel C. Phillips stated: "We have recently been given . . . approval on our plans for continuing the lunar missions through Apollo 20...". Additional Details: here....

1969 July 29 - .
  • Tentative planning schedule for the Apollo program - . Nation: USA. Program: Apollo. Flight: Apollo 12; Apollo 13; Apollo 14; Apollo 15; Apollo 16; Apollo 17; Apollo 18; Apollo 19; Apollo 20. Spacecraft: Surveyor; Apollo Lunar Landing. NASA issued a tentative planning schedule for the Apollo program:

    FlightLaunch PlansTentative Landing Area
    Apollo 12November 1969Oceanus Procellarum lunar lowlands
    Apollo 13March 1970Fra Mauro highlands
    Apollo 14July 1970Crater Censorinus highlands
    Apollo 15November 1970Littrow volcanic area
    Apollo 16April 1971Crater Tycho (Surveyor VII impact area)
    Apollo 17September 1971Marius Hills volcanic domes
    Apollo 18February 1972Schroter's Valley, riverlike channel-ways
    Apollo 19July 1972Hyginus Rille region-Linear Rille, crater area
    Apollo 20December 1972Crater Copernicus, large crater impact area

1970 January 4 - . LV Family: Saturn V. Launch Vehicle: Saturn V.
  • NASA canceled the Apollo 20 mission and stretched out the remaining seven missions - . Nation: USA. Related Persons: Low, George. Program: Apollo. Flight: Apollo 20. Spacecraft: Apollo Lunar Landing. NASA had canceled the Apollo 20 mission and stretched out the remaining seven missions to six-month intervals, Deputy Administrator George M. Low told the press in an interview after dedication of the Lunar Science Institute (next to MSC in Houston). Budget restrictions had brought the decision to suspend Saturn V launch vehicle production after vehicle 515 and to use the Apollo 20 Saturn V to launch the first U.S. space station in 1972.

1970 January 7 - .
  • NASA issued instructions for deletion of the Apollo 20 mission from the program - . Nation: USA. Program: Apollo. Flight: Apollo 20. Spacecraft: Apollo LM. NASA issued instructions for deletion of the Apollo 20 mission from the program. MSC was directed to take immediate action to:

    • Stop work on LM-14 and determine its disposition.
    • Delete requirements for the Apollo 20 spacesuits and portable and secondary life support systems.
    • Determine disposition of CSM 115A pending a final decision as to its possible use in a second workshop mission.
    • Reevaluate orbital science experiments and assignments and prepare proposed revisions.

1970 January 7 - .
  • The Apollo 20 mission was deleted from the program. - . Nation: USA. Program: Skylab. Flight: Apollo 20. Summary: MSC was directed to take some immediate actions including determination of the disposition of CSM-115A, pending a final decision as to its possible use in a second Workshop mission..

1974 July - .
  • Apollo 20 (cancelled) - . Crew: Roosa; Lind; Lousma. Nation: USA. Related Persons: Roosa; Lind; Lousma. Program: Apollo. Flight: Apollo 20. Spacecraft: Apollo CSM. The preferred landing site was the Marius Hills, or, if the operational constraints were relaxed, the bright crater Tycho. The flight was cancelled on January 4, 1970, before any crew assignments were made. The most likely crew would have been Roosa (Commander); Lind (Lunar Module Pilot); and Lousma (Command Module Pilot).

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