CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1989-0688
COSMOS 1870
COSMOS 1870 (NORAD 18225) was deorbited in a controlled re-entry on 29 July 1989, after 2 years in orbit.
Controlled re-entryOfficial date
NORAD number
18225
International designator
1987-064A
Object type
Spacecraft
Country
USSR
Launched
25 Jul 1987Baikonur Cosmodrome
Re-entered (UTC)
29 Jul 1989UTC calendar day
Time in orbit
2 years735 days
How it ended
Deorbited (controlled re-entry)
Latitude range
71.9°N to 71.9°SFinal inclination 71.9°
Mass
18,500 kg
Operator
ZIKh
Built by
ZIKh
Bus
Almaz
Programme
Mech
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 71.9°, allowed a re-entry anywhere between 71.9°N and 71.9°S.
Life in orbit
2 yearsCOSMOS 1870’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 29 Jul 1989
1 entryFrom the same launch
1987-064
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1989-0688
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1989-0688
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.