COSMOS 2169, 21783
Orbit data source: Space-Track
COSMOS 2169, 21783 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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21783 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, Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 10 hours ago
TLE from 10 hours ago
0 COSMOS 2169
1 21783U 91077E 25259.28177201 .00000022 00000-0 61725-4 0 9995
2 21783 82.6071 23.9554 0017171 234.0144 125.9358 12.66305267564129Epoch: 2025-09-16T06:45Z
TLE epoch observation values (Epoch: 2025-09-16T06:45:45.101Z)
Latitude
-0.00001°
Longitude
-72.95684°
Altitude
1,407.615 km
Speed
7.153 km/s
True Right ascension
01h 35m 49s
True Declination
0° 00' 00"
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
09:56:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,407.687 km
Perigee altitude
1,380.995 km
Semi-major axis
7,772.478 km
Eccentricity
0.00172
Inclination
82.6071°
RAAN
23.9554°
Arg. of periapsis
234.0144°
True anomaly
126.09492°
Mean anomaly
125.9358°
Eccentric anomaly
126.01538°
Mean motion
3.16741 °/min
Orbital period
113.66 mins
BSTAR
0.000061725
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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 2169 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. |
|---|---|---|---|---|---|---|---|
| 12 mins | 2025-09-16 18:45:20.668Z | 19.046° NNE | 2025-09-16 18:51:20.668Z | 69.355° E | 22.319° | 2025-09-16 18:57:20.668Z | 117.751° SE |
| 15 mins | 2025-09-16 20:39:20.668Z | 346.379° N | 2025-09-16 20:46:20.668Z | 273.695° WNW | 42.966° | 2025-09-16 20:54:20.668Z | 186.686° SSW |
| 10 mins | 2025-09-17 07:33:20.668Z | 118.494° SE | 2025-09-17 07:37:20.668Z | 84.429° E | 21.172° | 2025-09-17 07:43:20.668Z | 35.733° NE |
| 15 mins | 2025-09-17 09:24:20.668Z | 197.218° SSW | 2025-09-17 09:31:20.668Z | 272.292° WNW | 43.254° | 2025-09-17 09:39:20.668Z | 2.829° NNE |
| 4 mins | 2025-09-17 11:26:20.668Z | 289.841° WNW | 2025-09-17 11:27:20.668Z | 297.367° NW | 12.452° | 2025-09-17 11:30:20.668Z | 319.684° 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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