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: 10 hours ago
TLE from 10 hours ago
0 COSMOS 2165
1 21779U 91077A 25259.21250878 .00000040 00000-0 15626-3 0 9993
2 21779 82.6057 47.2104 0009782 322.1145 211.2835 12.64911927562353Epoch: 2025-09-16T05:06Z
TLE epoch observation values (Epoch: 2025-09-16T05:06:00.758Z)
Latitude
6.53356°
Longitude
154.45377°
Altitude
1,411.37 km
Speed
7.152 km/s
True Right ascension
15h 05m 27s
True Declination
6° 29' 53"
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
07:40:13
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,407.66 km
Perigee altitude
1,392.443 km
Semi-major axis
7,778.189 km
Eccentricity
0.00098
Inclination
82.6057°
RAAN
47.2104°
Arg. of periapsis
322.1145°
True anomaly
211.22535°
Mean anomaly
211.2835°
Eccentric anomaly
211.25442°
Mean motion
3.16392 °/min
Orbital period
113.78 mins
BSTAR
0.00015626
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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 | 2025-09-16 19:59:26.882Z | 24.261° NE | 2025-09-16 20:04:26.882Z | 62.762° ENE | 17.53° | 2025-09-16 20:09:26.882Z | 101.912° ESE |
| 15 mins | 2025-09-16 21:53:26.882Z | 351.839° N | 2025-09-16 22:00:26.882Z | 264.42° W | 44.977° | 2025-09-16 22:08:26.882Z | 176.141° S |
| 6 mins | 2025-09-16 23:51:26.882Z | 302.59° NW | 2025-09-16 23:53:26.882Z | 286.788° WNW | 15.141° | 2025-09-16 23:57:26.882Z | 255.708° W |
| 7 mins | 2025-09-17 08:49:26.882Z | 103.966° ESE | 2025-09-17 08:52:26.882Z | 80.074° E | 16.107° | 2025-09-17 08:56:26.882Z | 48.466° ENE |
| 15 mins | 2025-09-17 10:39:26.882Z | 186.364° SSW | 2025-09-17 10:46:26.882Z | 336.414° NNW | 44.943° | 2025-09-17 10:54:26.882Z | 7.334° NNE |
| 8 mins | 2025-09-17 12:38:26.882Z | 266.715° W | 2025-09-17 12:42:26.882Z | 298.789° NW | 16.444° | 2025-09-17 12:46:26.882Z | 330.054° NNW |
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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