CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1990-0097
THOR ABLESTAR DEB
THOR ABLESTAR DEB (NORAD 551) re-entered Earth’s atmosphere on 16 February 1990.
Official dateFragment record
NORAD number
551
International designator
1961-015GL
Object type
Fragment
Country
United States
Parent launched
29 Jun 1961Cape Canaveral
Re-entered (UTC)
16 Feb 1990UTC calendar day
Time since launch
28 years, 7 months10,459 days
How it ended
Re-entered (natural decay)
Latitude range
66.7°N to 66.7°SFinal inclination 66.7°
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 66.7°, allowed a re-entry anywhere between 66.7°N and 66.7°S.
Life in orbit
THOR ABLESTAR DEB’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 16 Feb 1990
2 entries
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1990-0097
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1990-0097
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.