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, 0.9 m
Radar Cross Section
1.257 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 13 hours ago
TLE from 13 hours ago
0 COSMOS 2170
1 21784U 91077F 26306.12312494 .00000005 00000-0 -32579-4 0 9995
2 21784 82.6109 181.3761 0002769 1.8614 151.4359 12.62590029611485Epoch: 2026-11-02T02:57Z
TLE epoch observation values (Epoch: 2026-11-02T02:57:17.994Z)
Latitude
26.48132°
Longitude
-88.03941°
Altitude
1,417.249 km
Speed
7.153 km/s
True Right ascension
23h 50m 45s
True Declination
26° 21' 21"
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
11:16:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,411.748 km
Perigee altitude
1,407.435 km
Semi-major axis
7,787.728 km
Eccentricity
0.00028
Inclination
82.6109°
RAAN
181.3761°
Arg. of periapsis
1.8614°
True anomaly
151.45107°
Mean anomaly
151.4359°
Eccentric anomaly
151.44348°
Mean motion
3.15811 °/min
Orbital period
113.99 mins
BSTAR
-0.000032579
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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. |
|---|---|---|---|---|---|---|---|
| 14 mins | 2026-11-02 15:32:49.368Z | 149.684° SSE | 2026-11-02 15:39:49.368Z | 91.06° ESE | 38.049° | 2026-11-02 15:46:49.368Z | 25.326° NE |
| 14 mins | 2026-11-02 17:28:49.368Z | 220.991° SW | 2026-11-02 17:34:49.368Z | 283.129° WNW | 43.736° | 2026-11-02 17:42:49.368Z | 355.648° N |
| 7 mins | 2026-11-03 01:36:49.368Z | 37.682° NE | 2026-11-03 01:39:49.368Z | 60.503° ENE | 14.496° | 2026-11-03 01:43:49.368Z | 90.123° ESE |
| 14 mins | 2026-11-03 03:29:49.368Z | 357.035° N | 2026-11-03 03:35:49.368Z | 48.963° ENE | 74.732° | 2026-11-03 03:43:49.368Z | 167.358° S |
| 10 mins | 2026-11-03 05:25:49.368Z | 316.792° NNW | 2026-11-03 05:29:49.368Z | 284.765° WNW | 20.359° | 2026-11-03 05:35:49.368Z | 237.763° WSW |
| 5 mins | 2026-11-03 14:27:49.368Z | 92.316° ESE | 2026-11-03 14:29:49.368Z | 77.372° E | 13.171° | 2026-11-03 14:32:49.368Z | 55.103° ENE |
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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