DECAYED

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COSMOS 1892, 18421 (Decayed)

Orbit data source: Space-Track

COSMOS 1892, 18421 was a payload satellite owned by GRU (CIS) in LEO that was launched on Tue, 20 Oct 1987 UTC via a TSIKLON-3 launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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https://www.satcat.com/sats-embedded/18421?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

18421, 1987-088A

Orbit

Decayed

Country

CIS

Related business

Main Directorate of the General Staff of the Armed Forces of the Russian Federation (GRU_ (RU)

Manufacturer

Yuzhnoe

Mission

Decayed Defense Sigint

Bus & Motor

TSELINA-D, Unknown motor

Mass

1,750 kg wet, 1,750 kg dry

Launch date (UTC)

1987-10-20 (38 years ago)

Launch vehicle

TSIKLON-3

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 2 Pan, 6.5 m

Radar Cross Section

8.068 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 2 months ago

TLE from 2 months ago

0 COSMOS 1892
1 18421U 87088A   25336.62888916  .10264805 -12447-5  19810-3 0  9996
2 18421  82.4523  54.8042 0008543 257.3802 102.6546 16.46888756 89710

Epoch: 2025-12-02T15:05Z

TLE epoch observation values (Epoch: 2025-12-02T15:05:36.023Z)

Latitude

0.00002°

Longitude

116.69281°

Altitude

152.023 km

Speed

7.814 km/s

True Right ascension

03h 39m 13s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

05:39:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

149.919 km

Perigee altitude

138.775 km

Semi-major axis

6,522.484 km

Eccentricity

0.00085

Inclination

82.4523°

RAAN

54.8042°

Arg. of periapsis

257.3802°

True anomaly

102.7501°

Mean anomaly

102.6546°

Eccentric anomaly

102.70235°

Mean motion

4.12025 °/min

Orbital period

87.37 mins

BSTAR

0.0001981

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Other satellites on launch #88 in the year 1987 (1987-10-20 UTC)

SL-14 R/B, 18422

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COSMOS 1892 Visibility

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Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
This satellite is decayed.

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out COSMOS 1892, 18421 (Decayed) on other resources

View COSMOS 1892, 18421 (Decayed) on Celestrak

View COSMOS 1892, 18421 (Decayed) on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

COSMOS 1892, 18421 (Decayed)

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 months ago

TLE from 2 months ago

TLE epoch observation values (Epoch: 2025-12-02T15:05:36.023Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #88 in the year 1987 (1987-10-20 UTC)

COSMOS 1892 Visibility

Co-orbital & Co-planar RSOs

Check out COSMOS 1892, 18421 (Decayed) on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 months ago