COSMOS 2167, 21781
Orbit data source: Space-Track
COSMOS 2167, 21781 is a payload satellite owned by UNKS RF (CIS) in LEO that was launched on Tue, 12 Nov 1991 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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21781 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
NPO PM
Mission
Defense Communications
Bus & Motor
STRELA-3, Unknown motor
Mass
225 kg wet, 225 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.8 m
Radar Cross Section
1.257 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 COSMOS 2167
1 21781U 91077C 25258.97307633 .00000042 00000-0 16858-3 0 9990
2 21781 82.6031 55.6988 0006630 353.0903 125.0261 12.64281567561292Epoch: 2025-09-15T23:21Z
TLE epoch observation values (Epoch: 2025-09-15T23:21:13.794Z)
Latitude
61.03091°
Longitude
-123.27289°
Altitude
1,418.668 km
Speed
7.156 km/s
True Right ascension
14h 48m 49s
True Declination
60° 53' 50"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
09:56:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,407.798 km
Perigee altitude
1,397.48 km
Semi-major axis
7,780.776 km
Eccentricity
0.00066
Inclination
82.6031°
RAAN
55.6988°
Arg. of periapsis
353.0903°
True anomaly
125.08828°
Mean anomaly
125.0261°
Eccentric anomaly
125.0572°
Mean motion
3.16234 °/min
Orbital period
113.84 mins
BSTAR
0.00016858
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Other satellites on launch #77 in the year 1991 (1991-11-12 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.COSMOS 2167 Visibility forecast
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-09-16 20:15:18.677Z | 32.974° NE | 2025-09-16 20:19:18.677Z | 62.481° ENE | 13.156° | 2025-09-16 20:22:18.677Z | 84.609° E |
| 15 mins | 2025-09-16 22:08:18.677Z | 357.334° N | 2025-09-16 22:15:18.677Z | 76.976° E | 43.797° | 2025-09-16 22:23:18.677Z | 165.716° S |
| 9 mins | 2025-09-17 00:05:18.677Z | 313.896° NW | 2025-09-17 00:09:18.677Z | 279.479° WNW | 20.201° | 2025-09-17 00:14:18.677Z | 238.92° WSW |
| 14 mins | 2025-09-17 10:55:18.677Z | 174.322° S | 2025-09-17 11:01:18.677Z | 113.136° SE | 43.618° | 2025-09-17 11:09:18.677Z | 11.868° NNE |
| 11 mins | 2025-09-17 12:52:18.677Z | 251.379° W | 2025-09-17 12:57:18.677Z | 293.833° NW | 21.062° | 2025-09-17 13:03:18.677Z | 341.714° N |
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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