Selection and training On September 10, 1965, NASA began the selection process for the
fifth astronaut group. From a pool of 351 applicants, NASA picked 159 candidates who met the basic qualifications, including being
United States citizens born on or after December 1, 1929, who were no more than six feet tall. They were also required to have at least 1,000 hours of flight time in jet aircraft. Mattingly had previously shown little interest and inclination to apply for the astronaut program, but his views changed at the Air Force Test Pilot School where he and his classmates were offered the chance to apply for either
NASA or the
United States Air Force (USAF)
Manned Orbiting Laboratory program. Mattingly and Mitchell chose the latter and were rejected. The deadline for applying for the NASA group had passed, but one of their instructors was able to get NASA to accept their applications. Mattingly, a lieutenant in the Navy,
Apollo 8 and Apollo 11 At first, Mattingly was part of the support crew for
Apollo 8. Mattingly served as
CAPCOM during Apollo 8's second television transmission and subsequent preparation for
trans-Earth injection. Mattingly then trained in parallel with
Bill Anders for
Apollo 11 as backup command module pilot, because Anders was going to retire from NASA in August 1969 and, in case of mission delay, would be unavailable. As a result, he missed the dramatic in-flight explosion that crippled the spacecraft. On the ground, Mattingly played a large role in helping the crew solve the problem of power conservation during re-entry.
Apollo 16 The swapout from Apollo 13 placed Mattingly on the crew that flew
Apollo 16 (April 16–27, 1972), the fifth crewed lunar landing mission. The crew included
John Young (Commander), Mattingly (Command Module Pilot), and
Charlie Duke (
Lunar Module Pilot). The mission assigned to Apollo 16 was to collect samples from the lunar highlands near the crater
Descartes. While in
lunar orbit the scientific instruments aboard the Command/Service Module
Casper extended the photographic and geochemical mapping of a belt around the lunar equator. A combined total of 26 separate scientific experiments were conducted in lunar orbit and during cislunar coast. This experiment was a pathfinder for the first commercial venture to capitalize on the unique characteristics of space. The crew is also credited with effecting an in-flight repair that enabled them to activate the first operational "
Getaway Special" (composed of nine experiments that ranged from
algae and
duckweed growth in space to
fruit fly and
brine shrimp genetic studies). STS-4 completed 112 orbits of the Earth before landing at
Edwards Air Force Base, California, on July 4, 1982.
STS-51-C, the first Space Shuttle
Department of Defense mission, launched from Kennedy Space Center, Florida, on January 24, 1985. The crew included Mattingly (spacecraft commander),
Loren Shriver (pilot),
James Buchli and
Ellison Onizuka (
Mission Specialists), and
Gary Payton (
Manned Spaceflight Engineer). STS-51-C performed its DOD mission, which included deployment of a modified Inertial Upper Stage (IUS) vehicle from the . Landing occurred on January 27, 1985. File:Commodore Thomas K. Mattingly II, USN (2).jpg|Mattingly in his Navy uniform in 1985 == Post-NASA career ==