RocketSpace Shuttle
SpaceportCape Canaveral & Kennedypad LC39A
OutcomeSuccess
Launch agencyNASA JSCUnited States
Flight
- Date and time (UTC)
- April 28, 1991, 11:33
- Launch designation
- 1991-031
- Mission
- OV-103 Research/FF
- Flight name
- SDIO/SPAS
- Vehicle flight ID
- STS-39
- Year
- Launches in 1991
Orbit and payload
- Initial apogee
- 270 km
- Payload mass to orbit
- 109.5 t
- Payloads
- 8
- GCAT launch code
- OS
Payloads
| Payload | Designation | Owner | Mission type | Mass | Fate |
|---|---|---|---|---|---|
| Discovery (STS-39) | 1991-031ANORAD 21242 | NASA Johnson Space Flight Center | Human spaceflight | 96.7 t | Landed · May 6, 1991 |
| IBSS/SPAS | 1991-031BNORAD 21244 | Strategic Defense Initiative Organization, DoD | Missile early warning | 1,835 kg | Attached to another object · May 1, 1991 |
| CRO-C | 1991-031DNORAD 21245 | Strategic Defense Initiative Organization, DoD | Technology | 70 kg | Reentered (orbital decay) · May 14, 1991 |
| CRO-B | 1991-031ENORAD 21246 | Strategic Defense Initiative Organization, DoD | Technology | 88 kg | Reentered (orbital decay) · May 12, 1991 |
| CRO-A | 1991-031FNORAD 21247 | Strategic Defense Initiative Organization, DoD | Technology | 90 kg | Reentered (orbital decay) · May 13, 1991 |
| USA 70 | 1991-031CNORAD 21262 | National Reconnaissance Office | Communications | 122 kg | Reentered (orbital decay) · Aug 15, 1991 |
| STP-1 | 1991-031 | USAF SMC/DoD Space Test Program | — | — | — |
| AFP-675 | 1991-031 | USAF SMC/DoD Space Test Program | — | — | — |
Source: GCAT launch list and payload catalogs, Jonathan C. McDowell (CC BY 4.0). Orbit values are the initial orbit reported for the launch.