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: 6 hours ago
TLE from 6 hours ago
0 COSMOS 2170
1 21784U 91077F 26306.44465137 .00000005 00000-0 -31467-4 0 9998
2 21784 82.6109 181.1718 0002756 1.2211 172.7887 12.62590036611523Epoch: 2026-11-02T10:40Z
TLE epoch observation values (Epoch: 2026-11-02T10:40:17.878Z)
Latitude
5.86161°
Longitude
158.61666°
Altitude
1,416.566 km
Speed
7.152 km/s
True Right ascension
00h 01m 39s
True Declination
5° 49' 47"
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
12:27:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,411.738 km
Perigee altitude
1,407.445 km
Semi-major axis
7,787.728 km
Eccentricity
0.00028
Inclination
82.6109°
RAAN
181.1718°
Arg. of periapsis
1.2211°
True anomaly
172.79266°
Mean anomaly
172.7887°
Eccentric anomaly
172.79068°
Mean motion
3.15811 °/min
Orbital period
113.99 mins
BSTAR
-0.000031467
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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. |
|---|---|---|---|---|---|---|---|
| 15 mins | 2026-11-02 17:27:27.762Z | 216.07° SW | 2026-11-02 17:34:27.762Z | 276.704° WNW | 43.405° | 2026-11-02 17:42:27.762Z | 354.544° N |
| 6 mins | 2026-11-03 01:37:27.762Z | 42.265° NE | 2026-11-03 01:39:27.762Z | 57.644° ENE | 14.456° | 2026-11-03 01:43:27.762Z | 87.764° E |
| 15 mins | 2026-11-03 03:29:27.762Z | 356.595° N | 2026-11-03 03:36:27.762Z | 92.91° ESE | 76.851° | 2026-11-03 03:44:27.762Z | 167.907° S |
| 9 mins | 2026-11-03 05:26:27.762Z | 312.603° NW | 2026-11-03 05:30:27.762Z | 278.785° WNW | 20.435° | 2026-11-03 05:35:27.762Z | 239.748° WSW |
| 5 mins | 2026-11-03 14:28:27.762Z | 87.67° E | 2026-11-03 14:30:27.762Z | 72.452° E | 13.152° | 2026-11-03 14:33:27.762Z | 50.834° ENE |
| 15 mins | 2026-11-03 16:16:27.762Z | 178.038° S | 2026-11-03 16:23:27.762Z | 102.153° ESE | 78.012° | 2026-11-03 16:31:27.762Z | 10.51° NNE |
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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