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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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: 6 hours ago
TLE from 6 hours ago
0 COSMOS 2167
1 21781U 91077C 26053.96187727 .00000027 00000-0 87356-4 0 9998
2 21781 82.6079 313.6218 0006940 350.0042 21.1890 12.64287627581516Epoch: 2026-02-22T23:05Z
TLE epoch observation values (Epoch: 2026-02-22T23:05:06.196Z)
Latitude
11.08238°
Longitude
175.93234°
Altitude
1,402.245 km
Speed
7.162 km/s
True Right ascension
21h 00m 16s
True Declination
11° 01' 23"
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
08:40:31
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,408.014 km
Perigee altitude
1,397.214 km
Semi-major axis
7,780.751 km
Eccentricity
0.00069
Inclination
82.6079°
RAAN
313.6218°
Arg. of periapsis
350.0042°
True anomaly
21.21777°
Mean anomaly
21.189°
Eccentric anomaly
21.20338°
Mean motion
3.16236 °/min
Orbital period
113.84 mins
BSTAR
0.000087356
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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 | 2026-02-23 05:28:29.960Z | 214.484° SW | 2026-02-23 05:28:29.960Z | 214.484° SW | 43.628° | 2026-02-23 05:35:29.960Z | 181.08° SSW |
| 5 mins | 2026-02-23 07:19:29.960Z | 296.174° NW | 2026-02-23 07:21:29.960Z | 280.835° WNW | 12.951° | 2026-02-23 07:24:29.960Z | 259.14° W |
| 9 mins | 2026-02-23 16:16:29.960Z | 109.995° ESE | 2026-02-23 16:20:29.960Z | 76.041° E | 18.533° | 2026-02-23 16:25:29.960Z | 38.075° NE |
| 14 mins | 2026-02-23 18:07:29.960Z | 192.526° SSW | 2026-02-23 18:13:29.960Z | 243.968° WSW | 44.213° | 2026-02-23 18:21:29.960Z | 4.729° NNE |
| 6 mins | 2026-02-23 20:07:29.960Z | 277.906° WNW | 2026-02-23 20:10:29.960Z | 301.41° NW | 14.285° | 2026-02-23 20:13:29.960Z | 324.286° NNW |
| 13 mins | 2026-02-24 04:08:29.960Z | 12.02° NNE | 2026-02-24 04:14:29.960Z | 75.485° E | 33.853° | 2026-02-24 04:21:29.960Z | 141.189° SSE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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