CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1966-0321
PROTON 3
PROTON 3 (NORAD 2290) re-entered Earth’s atmosphere on 16 September 1966, after 2 months in orbit.
Official date
NORAD number
2290
International designator
1966-060A
Object type
Spacecraft
Country
USSR
Launched
6 Jul 1966Baikonur Cosmodrome
Re-entered (UTC)
16 Sep 1966UTC calendar day
Time in orbit
2 months72 days
How it ended
Re-entered (natural decay)
Latitude range
63.5°N to 63.5°SFinal inclination 63.5°
Mass
12,200 kg
Operator
TsKBEM
Built by
TsKBEM
Bus
Proton N-4
Programme
N-4
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 63.5°, allowed a re-entry anywhere between 63.5°N and 63.5°S.
Life in orbit
2 monthsPROTON 3’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1966-060
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1966-0321
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1966-0321
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.