The US space program has seen many missions canceled due to budget limitations and unforeseen technical problems. The last 3 Apollo Moon missions were canceled as NASA changed its priorities to the Apollo-Soyuz and Skylab programs. During the Space Shuttle program, many missions were canceled as a result of the Challenger and the Columbia disasters. Many early Shuttle missions were canceled due to delays in the development of the spacecraft. Other missions were canceled due to changes in payload and missions requirements. In many cases, mission patches had already been designed before the missions were canceled. After the Columbia accident, NASA developed a contingency program for the shuttle. A second shuttle was kept in a ready condition to be launched on short notice in case the current mission became disabled and was not able to return to Earth. Some of these contingency missions created designs for mission patches, all though none were ever used during a mission into space. Many mission patch designs for canceled missions were lost or remain unpublished. If more of these designs surface in the future, they will be posted here as they become available.

STS-41F Cancelled Mission Patch STS-51D Cancelled Mission Patch STS-051E Cancelled Mission Patch

STS-41F

Orbiter: Discovery
Planned Launch: August 19, 1984

STS-51D

Orbiter: Discovery
Planned Launch: March 1985

STS-51E

Orbiter: Challenger
Planned Launch: March 1985
STS-061E Cancelled Mission Patch STS-061F Cancelled Mission Patch STS-061G Cancelled Mission Patch

STS-61E

Orbiter: Columbia
Planned Launch: March 6, 1986

STS-61F

Orbiter: Challenger
Planned Launch: May 15, 1986

STS-61G

Orbiter: Atlantis
Planned Launch: May 20, 1986
STS-062A Version 1 Cancelled Mission Patch STS-62A Version 2 Cancelled Mission Patch STS-62A Version 3 Cancelled Mission Patch

STS-62A

Proposed Design Version 1
Orbiter: Discovery
Planned Launch: July 1, 1986

STS-62A

Proposed Design Version 2
Orbiter: Discovery
Planned Launch: July 1, 1986

STS-62A

Proposed Design Version 3
Orbiter: Discovery
Planned Launch: July 1, 1986
STS-400 Version 1 Contingency Mission Patch STS-400 Version 2 Contingency Mission Patch STS-400 Version 3 Contingency Mission Patch

STS-400

Contingency Mission
Proposed Design Version 1
Orbiter: Endeavour
Launch: Launch on Need (LON)

STS-400

Contingency Mission
Proposed Design Version 2
Orbiter: Endeavour
Launch: Launch on Need (LON)

STS-400

Contingency Mission
Proposed Design Version 3
Orbiter: Endeavour
Launch: Launch on Need (LON)