CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1987-0527
COSMOS 1866
COSMOS 1866 (NORAD 18184) re-entered Earth’s atmosphere on 6 November 1987, after 3 months in orbit.
Official date
NORAD number
18184
International designator
1987-059A
Object type
Spacecraft
Country
USSR
Launched
9 Jul 1987Plesetsk Cosmodrome
Re-entered (UTC)
6 Nov 1987UTC calendar day
Time in orbit
3 months120 days
How it ended
Re-entered (natural decay)
Latitude range
67.1°N to 67.1°SFinal inclination 67.1°
Mass
2,886 kg
Operator
UNKS
Built by
TsSKB
Bus
Yantar'-4K2
Programme
Kobal't
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 67.1°, allowed a re-entry anywhere between 67.1°N and 67.1°S.
Life in orbit
3 monthsCOSMOS 1866’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 6 Nov 1987
1 entryFrom the same launch
1987-059
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1987-0527
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1987-0527
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.