SL-8 DEB, 21166
Orbit data source: Space-Track
SL-8 DEB, 21166 is space debris in LEO originally from a launch on Tue, 12 Feb 1991 UTC launched from the Plesetsk Missile And Space Complex (PKMTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.
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21166 intel report (Beta)
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Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 SL-8 DEB
1 21166U 91009AD 26171.45851214 .00000030 00000-0 42787-3 0 9996
2 21166 74.0617 232.9617 0122563 286.5413 83.2900 12.19243158570731Epoch: 2026-06-20T11:00Z
TLE epoch observation values (Epoch: 2026-06-20T11:00:15.448Z)
Latitude
10.75167°
Longitude
162.31796°
Altitude
1,587.202 km
Speed
7.081 km/s
True Right ascension
15h 44m 13s
True Declination
10° 41' 43"
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
02:30:11
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,691.413 km
Perigee altitude
1,496.002 km
Semi-major axis
7,971.845 km
Eccentricity
0.01226
Inclination
74.0617°
RAAN
232.9617°
Arg. of periapsis
286.5413°
True anomaly
84.68721°
Mean anomaly
83.29°
Eccentric anomaly
83.98837°
Mean motion
3.04933 °/min
Orbital period
118.06 mins
BSTAR
0.00042787
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Other satellites on launch #9 in the year 1991 (1991-02-12 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.SL-8 DEB 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 | 2026-06-22 16:46:20.931Z | 319.07° NNW | 2026-06-22 16:53:20.931Z | 269.18° W | 26.102° | 2026-06-22 17:00:20.931Z | 216.357° SW |
| 15 mins | 2026-06-23 04:01:20.931Z | 160.042° S | 2026-06-23 04:08:20.931Z | 96.906° ESE | 34.77° | 2026-06-23 04:16:20.931Z | 32.766° NE |
| 16 mins | 2026-06-23 06:01:20.931Z | 231.36° WSW | 2026-06-23 06:08:20.931Z | 290.982° WNW | 35.581° | 2026-06-23 06:17:20.931Z | 8.113° NNE |
| 4 mins | 2026-06-23 08:11:20.931Z | 317.131° NNW | 2026-06-23 08:12:20.931Z | 323.397° NNW | 11.123° | 2026-06-23 08:15:20.931Z | 341.911° N |
| 8 mins | 2026-06-23 12:24:20.931Z | 17.063° NNE | 2026-06-23 12:27:20.931Z | 36.328° NE | 13.881° | 2026-06-23 12:32:20.931Z | 68.154° E |
| 17 mins | 2026-06-23 14:23:20.931Z | 351.365° N | 2026-06-23 14:31:20.931Z | 70.312° E | 39.84° | 2026-06-23 14:40:20.931Z | 142.09° SSE |
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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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