CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1987-0426
ISEE 1
ISEE 1 (NORAD 10422) re-entered Earth’s atmosphere on 26 September 1987, after 9 years, 11 months in orbit.
Official date
NORAD number
10422
International designator
1977-102A
Object type
Spacecraft
Country
United States
Launched
22 Oct 1977Cape Canaveral
Re-entered (UTC)
26 Sep 1987UTC calendar day
Time in orbit
9 years, 11 months3,626 days
How it ended
Re-entered (natural decay)
Latitude range
8.7°N to 8.7°SFinal inclination 8.7°
Mass
340 kg
Operator
GSFC
Built by
GSFC
Bus
IMP
Programme
DeltaEx
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 8.7°, allowed a re-entry anywhere between 8.7°N and 8.7°S.
Life in orbit
9 years, 11 monthsISEE 1’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 26 Sep 1987
2 entriesFrom the same launch
1977-102
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1987-0426
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1987-0426
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.