CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1989-1001
SMM
SMM (NORAD 11703) re-entered Earth’s atmosphere after release from its host on 2 December 1989, after 9 years, 9 months in orbit.
Official date
NORAD number
11703
International designator
1980-014A
Object type
Spacecraft
Country
United States
Launched
14 Feb 1980Cape Canaveral
Re-entered (UTC)
2 Dec 1989UTC calendar day
Time in orbit
9 years, 9 months3,579 days
How it ended
Re-entered after release from its host
Latitude range
28.5°N to 28.5°SFinal inclination 28.5°
Mass
1,721 kg
Operator
GSFC
Built by
Fairchild
Bus
MMS
Programme
SMM
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, 9 monthsSMM’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 2 Dec 1989
2 entriesFrom the same launch
1980-014
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1989-1001
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1989-1001
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.