CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1974-0104
ESRO 4
ESRO 4 (NORAD 6285) re-entered Earth’s atmosphere on 15 April 1974, after 1 year, 4 months in orbit.
Official date
NORAD number
6285
International designator
1972-092A
Object type
Spacecraft
Country
ESRO
Launched
22 Nov 1972Vandenberg
Re-entered (UTC)
15 Apr 1974UTC calendar day
Time in orbit
1 year, 4 months509 days
How it ended
Re-entered (natural decay)
Latitude range
88.9°N to 88.9°SFinal inclination 91.1°
Mass
115 kg
Operator
ESRO
Built by
HSD
Bus
ESRO 2
Programme
ESRO
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 91.1°, allowed a re-entry anywhere between 88.9°N and 88.9°S.
Life in orbit
1 year, 4 monthsESRO 4’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 15 Apr 1974
1 entryFrom the same launch
1972-092
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1974-0104
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1974-0104
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.