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Mission type Spacecraft deployment
Mission duration 4 days, 2 hours, 45 minutes, 20 seconds planned
Spacecraft properties
Spacecraft Space Shuttle Atlantis
Crew size 4
Members David M. Walker
Ronald J. Grabe
Norman E. Thagard
James van Hoften
Start of mission
Launch date 20 May 1986, 20:21:00 UTC
Never launched
Launch site Kennedy LC-39A
End of mission
Landing date 24 May 1986, 23:06:20 UTC
Landing site Kennedy Runway 33[citation needed]
Orbital parameters
Inclination 34.3 degrees

STS-61-G patch.png

STS-61-G crew.jpg
Left to right: Walker, Grabe, Thagard, van Hoften

STS-61-G was a United States Space Shuttle mission planned to launch on May 20, 1986, using Atlantis. The main objective of this mission was to launch the Galileo spacecraft toward Jupiter using the Centaur-G upper stage. It was canceled after the Challenger disaster.


Position Astronaut
Commander David M. Walker
Second spaceflight
Pilot Ronald J. Grabe
Second spaceflight
Mission Specialist 1 Norman E. Thagard
Third spaceflight
Mission Specialist 2 James D. A. van Hoften
Third spaceflight

Crew notes[edit]

John M. Fabian was scheduled to fly as Mission Specialist 1 on his third trip to space, but due to concerns and stress about the Centaur-G worst-case-scenarios, he resigned from this mission.[1] His replacement was Norman E. Thagard.[2] Most of the crew sans van Hoften flew on STS-30 in May 1989, with Mary Cleave taking the place of van Hoften and the addition of rookie Mark Lee. Galileo was launched on STS-34 in October 1989, using the Inertial Upper Stage booster instead of the Centaur-G (which was canceled in 1986).

See also[edit]


  1. ^ NASA. "Fabian Biographie". NASA Bios. NASA. 
  2. ^ "The new shuttle crews are named". Lodi News-Sentinel. Lodi, California. 20 September 1985.