CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0260
THOR ABLE R/B
THOR ABLE R/B (NORAD 28) re-entered Earth’s atmosphere on 3 July 1991, after 31 years, 3 months in orbit.
Official date
NORAD number
28
International designator
1960-002A
Object type
Rocket body
Country
United States
Launched
1 Apr 1960Cape Canaveral
Re-entered (UTC)
3 Jul 1991UTC calendar dayAlso recorded as 2 Jul 1991
Time in orbit
31 years, 3 months11,415 days
How it ended
Re-entered (natural decay)
Latitude range
48.3°N to 48.3°SFinal inclination 48.3°
Mass
24 kg
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 48.3°, allowed a re-entry anywhere between 48.3°N and 48.3°S.
Life in orbit
31 years, 3 monthsTHOR ABLE R/B’s lowest and highest points above Earth, week by week, from its tracking history.
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0260
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0260
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.