![Astronaut Thomas K. (Ken) Mattingly II, who was scheduled as a prime crew member for the Apollo 13 lunar landing mission but was replaced in the final hours when it was discovered Astronaut Thomas K. (Ken) Mattingly II, who was scheduled as a prime crew member for the Apollo 13 lunar landing mission but was replaced in the final hours when it was discovered](https://l450v.alamy.com/450v/t27tp2/1-may-1982-these-two-astronauts-will-man-the-space-shuttle-columbia-for-nasas-fourth-and-final-sts-4-orbital-flight-test-thomas-k-ken-mattingly-ii-right-is-crew-commander-henry-w-hartsfield-jr-is-pilot-t27tp2.jpg)
Astronaut Thomas K. (Ken) Mattingly II, who was scheduled as a prime crew member for the Apollo 13 lunar landing mission but was replaced in the final hours when it was discovered
U.S. Space Flight History - STS-4 crew members Ken "TK" Mattingly and Henry "Hank" Hartsfield, along with NASA chief astronaut John Young depart the Operations and Checkout Building for launch complex 39A,
![Massimo on Twitter: "#HappyBirthday to Ken Mattingly: astronaut of missions Apollo 16, STS 4 and STS-51C; he also missed Apollo13 https://t.co/sxbgUAdIDE https://t.co/iEWZuthCRR" / Twitter Massimo on Twitter: "#HappyBirthday to Ken Mattingly: astronaut of missions Apollo 16, STS 4 and STS-51C; he also missed Apollo13 https://t.co/sxbgUAdIDE https://t.co/iEWZuthCRR" / Twitter](https://pbs.twimg.com/media/D13dr_KXgAA7qyB.jpg)
Massimo on Twitter: "#HappyBirthday to Ken Mattingly: astronaut of missions Apollo 16, STS 4 and STS-51C; he also missed Apollo13 https://t.co/sxbgUAdIDE https://t.co/iEWZuthCRR" / Twitter
![Astronaut Ken Mattingly 's spacesuit in the Science Museum of Los Angeles, California, USA Stock Photo - Alamy Astronaut Ken Mattingly 's spacesuit in the Science Museum of Los Angeles, California, USA Stock Photo - Alamy](https://c8.alamy.com/comp/S208XG/astronaut-ken-mattingly-s-spacesuit-in-the-science-museum-of-los-angeles-california-usa-S208XG.jpg)