SL-8 DEB, 21177
Orbit data source: Space-Track
SL-8 DEB, 21177 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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21177 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 21177U 91009AQ 26171.23553286 -.00000050 00000-0 -37460-3 0 9998
2 21177 74.1069 90.4114 0145405 72.5107 80.5255 12.13555136563334Epoch: 2026-06-20T05:39Z
TLE epoch observation values (Epoch: 2026-06-20T05:39:10.039Z)
Latitude
24.31229°
Longitude
-90.18816°
Altitude
1,605.654 km
Speed
7.077 km/s
True Right ascension
17h 32m 13s
True Declination
24° 11' 50"
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
03:45:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,734.884 km
Perigee altitude
1,502.331 km
Semi-major axis
7,996.745 km
Eccentricity
0.01454
Inclination
74.1069°
RAAN
90.4114°
Arg. of periapsis
72.5107°
True anomaly
82.17369°
Mean anomaly
80.5255°
Eccentric anomaly
81.34913°
Mean motion
3.0351 °/min
Orbital period
118.61 mins
BSTAR
-0.0003746
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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 18:14:25.066Z | 151.263° SSE | 2026-06-22 18:21:25.066Z | 95.189° ESE | 27.992° | 2026-06-22 18:28:25.066Z | 38.876° NE |
| 16 mins | 2026-06-22 20:14:25.066Z | 220.194° SW | 2026-06-22 20:22:25.066Z | 304.029° NW | 39.257° | 2026-06-22 20:30:25.066Z | 11.264° NNE |
| 4 mins | 2026-06-22 22:24:25.066Z | 311.791° NW | 2026-06-22 22:25:25.066Z | 318.827° NNW | 11.904° | 2026-06-22 22:28:25.066Z | 339.513° N |
| 15 mins | 2026-06-23 04:38:25.066Z | 356.468° N | 2026-06-23 04:45:25.066Z | 62.67° ENE | 34.976° | 2026-06-23 04:53:25.066Z | 130.544° SE |
| 15 mins | 2026-06-23 06:39:25.066Z | 324.538° NNW | 2026-06-23 06:46:25.066Z | 261.805° W | 34.37° | 2026-06-23 06:54:25.066Z | 196.415° SSW |
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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