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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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: 1 day ago
TLE from 1 day ago
0 COSMOS 2170
1 21784U 91077F 26125.50915164 .00000022 00000-0 62780-4 0 9994
2 21784 82.6057 296.2082 0003062 47.6560 7.2704 12.62586803588697Epoch: 2026-05-05T12:13Z
TLE epoch observation values (Epoch: 2026-05-05T12:13:10.701Z)
Latitude
54.34964°
Longitude
-100.09727°
Altitude
1,418.812 km
Speed
7.157 km/s
True Right ascension
20h 26m 19s
True Declination
54° 12' 02"
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
22:20:07
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,411.989 km
Perigee altitude
1,407.22 km
Semi-major axis
7,787.742 km
Eccentricity
0.00031
Inclination
82.6057°
RAAN
296.2082°
Arg. of periapsis
47.656°
True anomaly
7.27484°
Mean anomaly
7.2704°
Eccentric anomaly
7.27262°
Mean motion
3.1581 °/min
Orbital period
113.99 mins
BSTAR
0.00006278
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-05-06 20:54:46.267Z | 41.894° NE | 2026-05-06 20:56:46.267Z | 56.374° ENE | 11.521° | 2026-05-06 20:58:46.267Z | 71.039° E |
| 15 mins | 2026-05-06 22:46:46.267Z | 359.646° N | 2026-05-06 22:53:46.267Z | 79.581° E | 42.501° | 2026-05-06 23:01:46.267Z | 161.528° S |
| 11 mins | 2026-05-07 00:42:46.267Z | 322.435° NNW | 2026-05-07 00:47:46.267Z | 280.73° WNW | 22.395° | 2026-05-07 00:53:46.267Z | 231.422° WSW |
| 15 mins | 2026-05-07 11:33:46.267Z | 171.598° S | 2026-05-07 11:40:46.267Z | 108.2° ESE | 42.481° | 2026-05-07 11:48:46.267Z | 13.581° NNE |
| 11 mins | 2026-05-07 13:31:46.267Z | 248.109° W | 2026-05-07 13:36:46.267Z | 292.089° WNW | 22.918° | 2026-05-07 13:42:46.267Z | 341.956° N |
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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