Mission typeSpacecraft deployment
Mission duration4 days, 1 hour, 11 minutes planned
Spacecraft properties
SpacecraftSpace Shuttle Atlantis
Crew size4
MembersDavid M. Walker
Ronald J. Grabe
Norman E. Thagard
James van Hoften
Start of mission
Launch date20 May 1986, 20:21:00 UTC
Never launched
Launch siteKennedy LC-39A
End of mission
Landing date24 May 1986, 21:32:00 UTC
Landing siteKennedy Runway 15[citation needed]
Orbital parameters
Inclination28.45 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
Would have been second spaceflight
Pilot Ronald J. Grabe
Would have been second spaceflight
Mission Specialist 1 Norman E. Thagard
Would have been third spaceflight
Mission Specialist 2 James D. A. van Hoften
Would have been third spaceflight

Crew notes

John M. Fabian was scheduled to fly as Mission Specialist 1 on his third trip to space, but he took advice from his wife who had earlier told him that "his marriage had a two-flight limit", he soon 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


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