CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1983-0248
EXPLORER 23
EXPLORER 23 (NORAD 924) came down while still attached to its host on 29 June 1983, after 18 years, 7 months in orbit.
Official date
NORAD number
924
International designator
1964-074A
Object type
Spacecraft
Country
United States
Launched
6 Nov 1964Wallops
Re-entered (UTC)
29 Jun 1983UTC calendar day
Time in orbit
18 years, 7 months6,809 days
How it ended
Came down attached to its host
Latitude range
51.9°N to 51.9°SFinal inclination 51.9°
Mass
96 kg
Operator
NASA LaRC
Built by
NASA LaRC
Bus
S-55
Programme
Explorer MME
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 51.9°, allowed a re-entry anywhere between 51.9°N and 51.9°S.
Life in orbit
18 years, 7 monthsEXPLORER 23’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 29 Jun 1983
2 entries
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1983-0248
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1983-0248
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.