COSMOS 2170, 21784
Orbit data source: Space-Track
COSMOS 2170, 21784 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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21784 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: 19 hours ago
TLE from 19 hours ago
0 COSMOS 2170
1 21784U 91077F 25326.65023652 .00000036 00000-0 14275-3 0 9994
2 21784 82.6116 40.3945 0003210 60.8561 57.6497 12.62581219568010Epoch: 2025-11-22T15:36Z
TLE epoch observation values (Epoch: 2025-11-22T15:36:20.435Z)
Latitude
60.68762°
Longitude
-88.85269°
Altitude
1,421.279 km
Speed
7.156 km/s
True Right ascension
13h 48m 25s
True Declination
60° 33' 11"
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
08:02:18
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,412.127 km
Perigee altitude
1,407.128 km
Semi-major axis
7,787.765 km
Eccentricity
0.00032
Inclination
82.6116°
RAAN
40.3945°
Arg. of periapsis
60.8561°
True anomaly
57.68078°
Mean anomaly
57.6497°
Eccentric anomaly
57.66524°
Mean motion
3.15809 °/min
Orbital period
113.99 mins
BSTAR
0.00014275
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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 2170 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. |
|---|---|---|---|---|---|---|---|
| 16 mins | 2025-11-23 16:18:06.789Z | 0.832° NNE | 2025-11-23 16:26:06.789Z | 78.169° E | 39.438° | 2025-11-23 16:34:06.789Z | 154.396° SSE |
| 12 mins | 2025-11-23 18:15:06.789Z | 325.772° NNW | 2025-11-23 18:20:06.789Z | 281.795° WNW | 26.29° | 2025-11-23 18:27:06.789Z | 221.589° SW |
| 14 mins | 2025-11-24 05:07:06.789Z | 161.982° S | 2025-11-24 05:14:06.789Z | 77.531° E | 39.343° | 2025-11-24 05:21:06.789Z | 16.991° NNE |
| 12 mins | 2025-11-24 07:03:06.789Z | 236.821° WSW | 2025-11-24 07:09:06.789Z | 291.677° WNW | 26.666° | 2025-11-24 07:15:06.789Z | 344.408° 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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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