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: 12 hours ago
TLE from 12 hours ago
0 COSMOS 2165
1 21779U 91077A 25310.62188873 .00000044 00000-0 17859-3 0 9995
2 21779 82.6108 14.3828 0010399 195.0966 323.3597 12.64913762568852Epoch: 2025-11-06T14:55Z
TLE epoch observation values (Epoch: 2025-11-06T14:55:31.186Z)
Latitude
21.43617°
Longitude
-78.47889°
Altitude
1,398.716 km
Speed
7.165 km/s
True Right ascension
12h 45m 54s
True Declination
21° 19' 45"
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
22:32:09
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,408.133 km
Perigee altitude
1,391.956 km
Semi-major axis
7,778.181 km
Eccentricity
0.00104
Inclination
82.6108°
RAAN
14.3828°
Arg. of periapsis
195.0966°
True anomaly
323.28851°
Mean anomaly
323.3597°
Eccentric anomaly
323.32411°
Mean motion
3.16392 °/min
Orbital period
113.78 mins
BSTAR
0.00017859
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-11-07 03:30:25.509Z | 121.655° SE | 2025-11-07 03:35:25.509Z | 82.176° E | 19.84° | 2025-11-07 03:40:25.509Z | 41.064° NE |
| 15 mins | 2025-11-07 05:22:25.509Z | 194.51° SSW | 2025-11-07 05:29:25.509Z | 275.978° WNW | 43.977° | 2025-11-07 05:37:25.509Z | 4.064° NNE |
| 6 mins | 2025-11-07 07:23:25.509Z | 281.8° WNW | 2025-11-07 07:25:25.509Z | 297.043° NW | 13.447° | 2025-11-07 07:29:25.509Z | 326.796° NNW |
| 14 mins | 2025-11-07 15:23:25.509Z | 9.542° NNE | 2025-11-07 15:29:25.509Z | 69.911° E | 34.837° | 2025-11-07 15:37:25.509Z | 145.406° SSE |
| 13 mins | 2025-11-07 17:18:25.509Z | 331.084° NNW | 2025-11-07 17:24:25.509Z | 271.507° WNW | 31.2° | 2025-11-07 17:31:25.509Z | 211.258° SW |
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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