COSMOS 2166, 21780
Orbit data source: Space-Track
COSMOS 2166, 21780 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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21780 intel report (Beta)
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Expand to show TLE details & historyLast TLE update: 11 hours ago
TLE from 11 hours ago
0 COSMOS 2166
1 21780U 91077B 25358.77242046 .00000013 00000-0 12767-4 0 9998
2 21780 82.5998 357.5275 0003244 174.5045 0.3835 12.63443477573144TLE epoch observation values (Epoch: 2025-12-24T18:32:17.127Z)
Visualization orbit readout
Visualization observer readout
Orbital elements
Other satellites on launch #77 in the year 1991 (1991-11-12 UTC)
COSMOS 2166 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 | 2025-12-25 11:18:59.552Z | 1.324° NNE | 2025-12-25 11:26:59.552Z | 76.61° E | 38.587° | 2025-12-25 11:34:59.552Z | 152.666° SSE |
| 12 mins | 2025-12-25 13:15:59.552Z | 326.505° NNW | 2025-12-25 13:20:59.552Z | 281.826° WNW | 27.185° | 2025-12-25 13:27:59.552Z | 220.108° SW |
| 14 mins | 2025-12-26 00:07:59.552Z | 158.362° S | 2025-12-26 00:13:59.552Z | 91.076° ESE | 38.588° | 2025-12-26 00:21:59.552Z | 16.963° NNE |
| 12 mins | 2025-12-26 02:03:59.552Z | 238.24° WSW | 2025-12-26 02:08:59.552Z | 286.073° WNW | 27.769° | 2025-12-26 02:15:59.552Z | 347.834° 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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