CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1992-0006
EXPLORER 45 (SSS-A)
EXPLORER 45 (SSS-A) (NORAD 5598) re-entered Earth’s atmosphere on 10 January 1992, after 20 years, 1 month in orbit.
Official date
NORAD number
5598
International designator
1971-096A
Object type
Spacecraft
Country
United States
Launched
15 Nov 1971San Marco platform
Re-entered (UTC)
10 Jan 1992UTC calendar day
Time in orbit
20 years, 1 month7,361 days
How it ended
Re-entered (natural decay)
Latitude range
—
Mass
52 kg
Operator
GSFC
Built by
GSFC
Bus
SSS
Programme
Explorer SSS
Where it came down
Not on recordNo position was recorded for this re-entry. Its final orbit is not on record.
Life in orbit
20 years, 1 monthEXPLORER 45 (SSS-A)’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1971-096
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1992-0006
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1992-0006
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.