CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
2000-0145
GRO
GRO (NORAD 21225) re-entered Earth’s atmosphere after release from its host on 4 June 2000, after 9 years, 1 month in orbit.
Official date
NORAD number
21225
International designator
1991-027B
Object type
Spacecraft
Country
United States
Launched
5 Apr 1991Cape Canaveral
Re-entered (UTC)
4 Jun 2000UTC calendar day
Time in orbit
9 years, 1 month3,348 days
How it ended
Re-entered after release from its host
Latitude range
28.5°N to 28.5°SFinal inclination 28.5°
Mass
15,622 kg
Operator
GSFC
Built by
TRW
Bus
GRO
Programme
Great Obs
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 28.5°, allowed a re-entry anywhere between 28.5°N and 28.5°S.
Life in orbit
9 years, 1 monthGRO’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1991-027
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2000-0145
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/2000-0145
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.