CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0205
CRO-B
CRO-BU
CRO-B (NORAD 21246) re-entered Earth’s atmosphere on 12 May 1991, after 14 days in orbit.
Official dateIdentified from the historical record
NORAD number
21246
International designator
1991-031E
Object type
Spacecraft
Official listing
STS 39 DEB (CRO-B)Listed as a fragment
Country
United States
Launched
28 Apr 1991Cape Canaveral
Re-entered (UTC)
12 May 1991UTC calendar day
Time in orbit
14 days14 days
How it ended
Re-entered (natural decay)
Latitude range
57.0°N to 57.0°SFinal inclination 57.0°
Mass
88 kg
Operator
SDIO
Built by
DSI
Bus
CRO
Programme
SDIO SS
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
14 daysAlso ended on 12 May 1991
2 entriesFrom the same launch
1991-031
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0205
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0205
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.