CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
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Entry no.
1991-0398

COSMOS 1840 (GLONASS)

COSMOS 1840 (GLONASS) (NORAD 17904) re-entered Earth’s atmosphere on 13 September 1991, after 4 years, 4 months in orbit.

Official date
NORAD number
17904
International designator
1987-036C
Object type
Spacecraft
Country
USSR
Launched
24 Apr 1987Baikonur Cosmodrome
Re-entered (UTC)
13 Sep 1991UTC calendar dayAlso recorded as 14 Sep 1991
Time in orbit
4 years, 4 months1,603 days
How it ended
Re-entered (natural decay)
Latitude range
64.2°N to 64.2°SFinal inclination 64.2°
Mass
1,300 kg
Operator
UNKS
Built by
Omsk Av. Zav.
Bus
Uragan
Programme
Uragan

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 64.2°, allowed a re-entry anywhere between 64.2°N and 64.2°S.

Life in orbit

4 years, 4 months

COSMOS 1840 (GLONASS)’s lowest and highest points above Earth, week by week, from its tracking history.

Also ended on 13 Sep 1991

2 entries
1991-0397ARIANE 1 DEB1991-0399MIR DEB

From the same launch

1987-036
1987-0150SL-12 R/B(1)1987-0313SL-12 R/B(AUX MOTOR)1987-0549SL-12 R/B(AUX MOTOR)1991-0167SL-12 R/B(2)1991-0199COSMOS 1839 (GLONASS)1991-0209COSMOS 1838 (GLONASS)
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Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0398
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