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: 15 hours ago
TLE from 15 hours ago
0 COSMOS 2167
1 21781U 91077C 25340.57337010 .00000035 00000-0 13107-3 0 9996
2 21781 82.6066 3.6378 0007485 151.7511 17.9440 12.64285229571606Epoch: 2025-12-06T13:45Z
TLE epoch observation values (Epoch: 2025-12-06T13:45:39.176Z)
Latitude
10.14169°
Longitude
-99.69805°
Altitude
1,401.759 km
Speed
7.162 km/s
True Right ascension
12h 09m 15s
True Declination
10° 05' 14"
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
02:34:56
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,408.448 km
Perigee altitude
1,396.8 km
Semi-major axis
7,780.761 km
Eccentricity
0.00075
Inclination
82.6066°
RAAN
3.6378°
Arg. of periapsis
151.7511°
True anomaly
17.97045°
Mean anomaly
17.944°
Eccentric anomaly
17.95722°
Mean motion
3.16235 °/min
Orbital period
113.84 mins
BSTAR
0.00013107
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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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2025-12-07 12:15:35.370Z | 11.656° NNE | 2025-12-07 12:22:35.370Z | 71.053° E | 26.888° | 2025-12-07 12:28:35.370Z | 124.87° SE |
| 14 mins | 2025-12-07 14:11:35.370Z | 339.444° N | 2025-12-07 14:17:35.370Z | 272.578° WNW | 39.261° | 2025-12-07 14:25:35.370Z | 195.403° SSW |
| 12 mins | 2025-12-08 01:04:35.370Z | 132.309° SE | 2025-12-08 01:09:35.370Z | 87.191° E | 26.307° | 2025-12-08 01:16:35.370Z | 28.312° NE |
| 14 mins | 2025-12-08 02:57:35.370Z | 209° SW | 2025-12-08 03:04:35.370Z | 292.501° NW | 39.28° | 2025-12-08 03:11:35.370Z | 357.844° N |
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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