CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1987-0394
COSMOS 1873
COSMOS 1873 (NORAD 18318) re-entered Earth’s atmosphere on 14 September 1987, after 17 days in orbit.
Official date
NORAD number
18318
International designator
1987-071A
Object type
Spacecraft
Country
USSR
Launched
28 Aug 1987Baikonur Cosmodrome
Re-entered (UTC)
14 Sep 1987UTC calendar day
Time in orbit
17 days17 days
How it ended
Re-entered (natural decay)
Latitude range
64.8°N to 64.8°SFinal inclination 64.8°
Mass
11,008 kg
Operator
TsSKB
Built by
TsSKB
Bus
Orlets-2
Programme
Orlets
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 64.8°, allowed a re-entry anywhere between 64.8°N and 64.8°S.
Life in orbit
17 daysCOSMOS 1873’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 14 Sep 1987
2 entriesFrom the same launch
1987-071
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1987-0394
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1987-0394
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.