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: 14 hours ago
TLE from 14 hours ago
0 COSMOS 2165
1 21779U 91077A 25340.84001200 .00000029 00000-0 97315-4 0 9999
2 21779 82.6071 355.0810 0011426 128.8495 44.7903 12.64915097572673Epoch: 2025-12-06T20:09Z
TLE epoch observation values (Epoch: 2025-12-06T20:09:37.036Z)
Latitude
6.14234°
Longitude
156.01859°
Altitude
1,398.567 km
Speed
7.164 km/s
True Right ascension
11h 37m 08s
True Declination
6° 06' 32"
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
08:17:45
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,408.926 km
Perigee altitude
1,391.151 km
Semi-major axis
7,778.176 km
Eccentricity
0.00114
Inclination
82.6071°
RAAN
355.081°
Arg. of periapsis
128.8495°
True anomaly
44.88264°
Mean anomaly
44.7903°
Eccentric anomaly
44.83646°
Mean motion
3.16393 °/min
Orbital period
113.78 mins
BSTAR
0.000097315
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-12-07 11:03:28.639Z | 28.462° NE | 2025-12-07 11:07:28.639Z | 58.933° ENE | 15.746° | 2025-12-07 11:12:28.639Z | 97.558° ESE |
| 14 mins | 2025-12-07 12:57:28.639Z | 354.022° N | 2025-12-07 13:03:28.639Z | 21.277° NNE | 44.659° | 2025-12-07 13:11:28.639Z | 172.478° S |
| 7 mins | 2025-12-07 14:54:28.639Z | 306.843° NW | 2025-12-07 14:57:28.639Z | 282.219° WNW | 16.63° | 2025-12-07 15:01:28.639Z | 250.471° W |
| 7 mins | 2025-12-07 23:53:28.639Z | 99.433° ESE | 2025-12-07 23:56:28.639Z | 76.114° E | 14.537° | 2025-12-08 00:00:28.639Z | 46.39° ENE |
| 14 mins | 2025-12-08 01:43:28.639Z | 182.317° SSW | 2025-12-08 01:49:28.639Z | 148.577° SSE | 44.746° | 2025-12-08 01:57:28.639Z | 8.773° NNE |
| 9 mins | 2025-12-08 03:41:28.639Z | 261.616° W | 2025-12-08 03:45:28.639Z | 294.139° NW | 17.945° | 2025-12-08 03:50:28.639Z | 334.077° NNW |
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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