CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0039
THOR ABLESTAR DEB
THOR ABLESTAR DEB (NORAD 550) re-entered Earth’s atmosphere on 2 February 1991.
Official dateFragment record
NORAD number
550
International designator
1961-015GK
Object type
Fragment
Country
United States
Parent launched
29 Jun 1961Cape Canaveral
Re-entered (UTC)
2 Feb 1991UTC calendar dayAlso recorded as 3 Feb 1991
Time since launch
29 years, 7 months10,810 days
How it ended
Re-entered (natural decay)
Latitude range
67.0°N to 67.0°SFinal inclination 67.0°
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 67.0°, allowed a re-entry anywhere between 67.0°N and 67.0°S.
Life in orbit
THOR ABLESTAR DEB’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 2 Feb 1991
1 entry
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0039
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0039
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.