CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0196
IBSS
IBSS (NORAD 21244) was returned to Earth aboard the Space Shuttle on 6 May 1991, after 8 days in orbit.
Official date
NORAD number
21244
International designator
1991-031B
Object type
Spacecraft
Country
United States
Launched
28 Apr 1991Cape Canaveral
Landed (UTC)
6 May 1991UTC calendar day
Time in orbit
8 days8 days
How it ended
Returned to Earth aboard the Space Shuttle (retrieved)
Latitude range
57.0°N to 57.0°SFinal inclination 57.0°
Mass
1,835 kg
Operator
SDIO
Built by
DASA-O
Bus
SPAS
Programme
SPAS
Where it came down
Latitude band its orbit allowedExact position not recorded
No position was recorded for this re-entry. Its final orbit, inclined at 57.0°, allowed a re-entry anywhere between 57.0°N and 57.0°S.
Life in orbit
8 daysAlso ended on 6 May 1991
4 entriesFrom the same launch
1991-031
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0196
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0196
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.