COSMOS 2165, 21779
Orbit data source: Space-Track
COSMOS 2165, 21779 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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21779 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 2165
1 21779U 91077A 25293.76449935 .00000026 00000-0 81915-4 0 9994
2 21779 82.6113 25.1453 0009789 235.2251 238.3398 12.64913141566726Epoch: 2025-10-20T18:20Z
TLE epoch observation values (Epoch: 2025-10-20T18:20:52.743Z)
Latitude
65.53777°
Longitude
-116.01419°
Altitude
1,418.026 km
Speed
7.156 km/s
True Right ascension
12h 34m 40s
True Declination
65° 25' 08"
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
04:07:14
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,407.661 km
Perigee altitude
1,392.433 km
Semi-major axis
7,778.184 km
Eccentricity
0.00098
Inclination
82.6113°
RAAN
25.1453°
Arg. of periapsis
235.2251°
True anomaly
238.24438°
Mean anomaly
238.3398°
Eccentric anomaly
238.29208°
Mean motion
3.16392 °/min
Orbital period
113.78 mins
BSTAR
0.000081915
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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 2165 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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-10-21 09:07:26.786Z | 270.024° WNW | 2025-10-21 09:11:26.786Z | 300.326° NW | 14.469° | 2025-10-21 09:15:26.786Z | 330.029° NNW |
| 13 mins | 2025-10-21 17:09:26.786Z | 12.501° NNE | 2025-10-21 17:15:26.786Z | 76.786° E | 33.618° | 2025-10-21 17:22:26.786Z | 141.232° SSE |
| 12 mins | 2025-10-21 19:04:26.786Z | 330.583° NNW | 2025-10-21 19:10:26.786Z | 265.258° W | 32.475° | 2025-10-21 19:16:26.786Z | 211.395° SW |
| 13 mins | 2025-10-22 05:55:26.786Z | 148.427° SSE | 2025-10-22 06:01:26.786Z | 90.903° ESE | 33.198° | 2025-10-22 06:08:26.786Z | 23.962° NE |
| 13 mins | 2025-10-22 07:50:26.786Z | 224.622° SW | 2025-10-22 07:56:26.786Z | 287.333° WNW | 33.201° | 2025-10-22 08:03:26.786Z | 352.159° 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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