CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1981-0179
THOR ABLESTAR DEB
THOR ABLESTAR DEB (NORAD 153) re-entered Earth’s atmosphere on 20 April 1981.
Official dateFragment record
NORAD number
153
International designator
1961-015AP
Object type
Fragment
Country
United States
Parent launched
29 Jun 1961Cape Canaveral
Re-entered (UTC)
20 Apr 1981UTC calendar dayAlso recorded as 22 Apr 1981
Time since launch
19 years, 9 months7,235 days
How it ended
Re-entered (natural decay)
Latitude range
67.1°N to 67.1°SFinal inclination 67.1°
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 67.1°, allowed a re-entry anywhere between 67.1°N and 67.1°S.
Life in orbit
THOR ABLESTAR DEB’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 20 Apr 1981
2 entries
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1981-0179
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1981-0179
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.