CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
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Entry no.
1969-0195

PROTON 4

PROTON 4 (NORAD 3544) re-entered Earth’s atmosphere on 24 July 1969, after 8 months in orbit.

Official date
NORAD number
3544
International designator
1968-103A
Object type
Spacecraft
Country
USSR
Launched
16 Nov 1968Baikonur Cosmodrome
Re-entered (UTC)
24 Jul 1969UTC calendar day
Time in orbit
8 months250 days
How it ended
Re-entered (natural decay)
Latitude range
51.5°N to 51.5°SFinal inclination 51.5°
Mass
17,000 kg
Operator
TsKBEM
Built by
TsKBEM
Bus
N-6
Programme
N-6

Where it came down

Latitude band its orbit allowed
Exact position not recorded

No position was recorded for this re-entry. Its final orbit, inclined at 51.5°, allowed a re-entry anywhere between 51.5°N and 51.5°S.

Life in orbit

8 months

PROTON 4’s lowest and highest points above Earth, week by week, from its tracking history.

Also ended on 24 Jul 1969

1 entry
1969-0196APOLLO 11 CM (COLUMBIA)

From the same launch

1968-103
1969-0027SL-13 R/B
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Entered in the Orbital Register™, founding volume, September 2026.
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