List of Apollo mission types
Encyclopedia
In September 1967, Owen Maynard
Owen Maynard
Owen Eugene Maynard was a Canadian engineer who contributed to the design of the Canadian CF-105 Avro Arrow jet interceptor; and NASA's Apollo Lunar Module . Maynard was a member of the group of 32 Canadian and British engineers from Avro Canada who joined NASA when the Arrow was cancelled in 1959...

 of the Manned Spacecraft Center
Lyndon B. Johnson Space Center
The Lyndon B. Johnson Space Center is the National Aeronautics and Space Administration's center for human spaceflight training, research and flight control. The center consists of a complex of 100 buildings constructed on 1,620 acres in Houston, Texas, USA...

 in Houston, Texas
Houston, Texas
Houston is the fourth-largest city in the United States, and the largest city in the state of Texas. According to the 2010 U.S. Census, the city had a population of 2.1 million people within an area of . Houston is the seat of Harris County and the economic center of , which is the ...

 proposed a series of Apollo missions that would lead up to a manned lunar landing. Seven mission types were outlined, each testing a specific set of components and tasks, and each previous step would need to be completed successfully before the next mission type could be undertaken. These were:
  • A - Unmanned Saturn V
    Saturn V
    The Saturn V was an American human-rated expendable rocket used by NASA's Apollo and Skylab programs from 1967 until 1973. A multistage liquid-fueled launch vehicle, NASA launched 13 Saturn Vs from the Kennedy Space Center, Florida with no loss of crew or payload...

     and Command/Service Module
    Apollo Command/Service Module
    The Command/Service Module was one of two spacecraft, along with the Lunar Module, used for the United States Apollo program which landed astronauts on the Moon. It was built for NASA by North American Aviation...

     (CSM) development (Apollo 4
    Apollo 4
    Apollo 4, , was the first unmanned test flight of the Saturn V launch vehicle, which was ultimately used by the Apollo program to send the first men to the Moon...

    , Apollo 6
    Apollo 6
    Apollo 6, launched on April 4, 1968, was the Apollo program's second and last A type mission—unmanned test flight of its Saturn V launch vehicle. It was intended to demonstrate full lunar injection capability of the Saturn V, and the capability of the Command Module's heat shield to withstand a...

    )
  • B - Unmanned Lunar Module
    Apollo Lunar Module
    The Apollo Lunar Module was the lander portion of the Apollo spacecraft built for the US Apollo program by Grumman to carry a crew of two from lunar orbit to the surface and back...

     (LM) development (Apollo 5
    Apollo 5
    Apollo 5 was the first unmanned flight of the Apollo Lunar Module, which would later carry astronauts to the lunar surface. It lifted off on January 22, 1968 with a Saturn IB rocket.-Objectives:...

    )
  • C - Manned CSM evaluation in low Earth orbit
    Low Earth orbit
    A low Earth orbit is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km...

     (Apollo 7
    Apollo 7
    Apollo 7 was the first manned mission in the American Apollo space program, and the first manned US space flight after a cabin fire killed the crew of what was to have been the first manned mission, AS-204 , during a launch pad test in 1967...

    )
  • D - Manned CSM and LM development in low Earth orbit (originally planned for Apollo 8; flown as Apollo 9
    Apollo 9
    Apollo 9, the third manned mission in the American Apollo space program, was the first flight of the Command/Service Module with the Lunar Module...

    )
  • E - Manned CSM and LM operations, a simulated lunar mission in an elliptical medium Earth orbit
    Medium Earth Orbit
    Medium Earth orbit , sometimes called intermediate circular orbit , is the region of space around the Earth above low Earth orbit and below geostationary orbit ....

     with an apogee of 4600 mi (7400 km)
  • F - Manned CSM and LM operations in lunar orbit, a "dress rehearsal" for the first landing (Apollo 10
    Apollo 10
    Apollo 10 was the fourth manned mission in the American Apollo space program. It was an F type mission—its purpose was to be a "dry run" for the Apollo 11 mission, testing all of the procedures and components of a Moon landing without actually landing on the Moon itself. The mission included the...

    )
  • G - First manned lunar landing
    Moon landing
    A moon landing is the arrival of a spacecraft on the surface of the Moon. This includes both manned and unmanned missions. The first human-made object to reach the surface of the Moon was the Soviet Union's Luna 2 mission on 13 September 1959. The United States's Apollo 11 was the first manned...

     (Apollo 11
    Apollo 11
    In early 1969, Bill Anders accepted a job with the National Space Council effective in August 1969 and announced his retirement as an astronaut. At that point Ken Mattingly was moved from the support crew into parallel training with Anders as backup Command Module Pilot in case Apollo 11 was...

    )


The first manned Lunar Module, LM-3, was not ready in time for the December 1968 launch date of Apollo 8, so Apollo 8
Apollo 8
Apollo 8, the second manned mission in the American Apollo space program, was the first human spaceflight to leave Earth orbit; the first to be captured by and escape from the gravitational field of another celestial body; and the first crewed voyage to return to Earth from another celestial...

 was flown as a lunar orbital mission using just the CSM (sometimes referred to as "the C Prime mission") and the E mission was canceled.

The first landing would be followed by more advanced lunar missions:
  • H - precision landings with up to two-day stays on the Moon, with two lunar Extra-Vehicular Activities
    Extra-vehicular activity
    Extra-vehicular activity is work done by an astronaut away from the Earth, and outside of a spacecraft. The term most commonly applies to an EVA made outside a craft orbiting Earth , but also applies to an EVA made on the surface of the Moon...

     or "moonwalks" (Apollo 12
    Apollo 12
    Apollo 12 was the sixth manned flight in the American Apollo program and the second to land on the Moon . It was launched on November 14, 1969 from the Kennedy Space Center, Florida, four months after Apollo 11. Mission commander Charles "Pete" Conrad and Lunar Module Pilot Alan L...

    , Apollo 13
    Apollo 13
    Apollo 13 was the seventh manned mission in the American Apollo space program and the third intended to land on the Moon. The craft was launched on April 11, 1970, at 13:13 CST. The landing was aborted after an oxygen tank exploded two days later, crippling the service module upon which the Command...

     (planned), Apollo 14
    Apollo 14
    Apollo 14 was the eighth manned mission in the American Apollo program, and the third to land on the Moon. It was the last of the "H missions", targeted landings with two-day stays on the Moon with two lunar EVAs, or moonwalks....

    )
  • I - long duration CSM lunar orbital surveys using a Scientific Instrument Module mounted in an empty Service Module bay. These were incorporated into the J missions.
  • J - longer three-day stays using an Extended LM, with three LEVAs and a Lunar Roving Vehicle
    Lunar rover
    The Lunar Roving Vehicle or lunar rover was a battery-powered four-wheeled rover used on the Moon in the last three missions of the American Apollo program during 1971 and 1972...

     (Apollo 15
    Apollo 15
    Apollo 15 was the ninth manned mission in the American Apollo space program, the fourth to land on the Moon and the eighth successful manned mission. It was the first of what were termed "J missions", long duration stays on the Moon with a greater focus on science than had been possible on previous...

    , Apollo 16
    Apollo 16
    Young and Duke served as the backup crew for Apollo 13; Mattingly was slated to be the Apollo 13 command module pilot until being pulled from the mission due to his exposure to rubella through Duke.-Backup crew:...

    , Apollo 17
    Apollo 17
    Apollo 17 was the eleventh and final manned mission in the American Apollo space program. Launched at 12:33 a.m. EST on December 7, 1972, with a three-member crew consisting of Commander Eugene Cernan, Command Module Pilot Ronald Evans, and Lunar Module Pilot Harrison Schmitt, Apollo 17 remains the...

    ). Apollo 18 to 20 would have been J missions. Apollo 15 was originally planned as an H mission but was promoted to J as the program was curtailed.
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