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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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 2165
1 21779U 91077A 26125.79249882 .00000032 00000-0 11579-3 0 9996
2 21779 82.6049 259.2785 0011281 147.3484 324.0521 12.64920783591632Epoch: 2026-05-05T19:01Z
TLE epoch observation values (Epoch: 2026-05-05T19:01:11.898Z)
Latitude
67.56218°
Longitude
-87.90849°
Altitude
1,407.261 km
Speed
7.166 km/s
True Right ascension
04h 04m 12s
True Declination
67° 27' 03"
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
21:24:22
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,408.79 km
Perigee altitude
1,391.241 km
Semi-major axis
7,778.152 km
Eccentricity
0.00113
Inclination
82.6049°
RAAN
259.2785°
Arg. of periapsis
147.3484°
True anomaly
323.97612°
Mean anomaly
324.0521°
Eccentric anomaly
324.01412°
Mean motion
3.16394 °/min
Orbital period
113.78 mins
BSTAR
0.00011579
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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. |
|---|---|---|---|---|---|---|---|
| 14 mins | 2026-05-06 19:43:10.416Z | 8.876° NNE | 2026-05-06 19:50:10.416Z | 74.897° E | 32.196° | 2026-05-06 19:57:10.416Z | 138.702° SSE |
| 13 mins | 2026-05-06 21:39:10.416Z | 332.495° NNW | 2026-05-06 21:45:10.416Z | 266.45° W | 33.862° | 2026-05-06 21:52:10.416Z | 206.097° SW |
| 12 mins | 2026-05-07 08:31:10.416Z | 142.519° SSE | 2026-05-07 08:36:10.416Z | 93.39° ESE | 31.661° | 2026-05-07 08:43:10.416Z | 25.688° NE |
| 13 mins | 2026-05-07 10:25:10.416Z | 221.442° SW | 2026-05-07 10:31:10.416Z | 284.289° WNW | 34.469° | 2026-05-07 10:38:10.416Z | 352.617° 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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