Discovery (OV-103):
- Constructed: 1979
- Status: Operational Orbiter
- Flights: 39
- Maiden Flight: STS-41-D (August 30–September 5, 1984)
- Final Flight: STS-133 (February 24–March 9, 2011)
- Notable Events: Flew more missions than any other orbiter. Deployed the Hubble Space Telescope.