STS-61-M
STS-61-M was a proposed NASA Space Shuttle program mission, planned for July 1986 but canceled following the Space Shuttle Challenger disaster.
Payload was to have been TDRS-D of the U.S. tracking and data relay satellite satellites. Wikipedia
Start date: July 22, 1986
Crew size: 6
Members: Loren J. Shriver; Bryan D. O'Connor; Mark C. Lee; Sally K. Ride; William Frederick Fisher; Robert Wood