SL-8 DEB, 21159
Orbit data source: Space-Track
SL-8 DEB, 21159 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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21159 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
Unknown
Mission
Spacecraft
Bus & Motor
Unknown
Mass
Unknown
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Unknown shape, 0.2 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 SL-8 DEB
1 21159U 91009W 26171.45028441 -.00000011 00000-0 32729-4 0 9992
2 21159 73.9388 163.7743 0143425 76.4354 80.1357 12.29089108583412Epoch: 2026-06-20T10:48Z
TLE epoch observation values (Epoch: 2026-06-20T10:48:24.573Z)
Latitude
20.92594°
Longitude
-93.28231°
Altitude
1,537.348 km
Speed
7.107 km/s
True Right ascension
22h 29m 56s
True Declination
20° 49' 22"
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
23:21:47
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,664.788 km
Perigee altitude
1,437.339 km
Semi-major axis
7,929.2 km
Eccentricity
0.01434
Inclination
73.9388°
RAAN
163.7743°
Arg. of periapsis
76.4354°
True anomaly
81.7597°
Mean anomaly
80.1357°
Eccentric anomaly
80.94723°
Mean motion
3.07397 °/min
Orbital period
117.11 mins
BSTAR
0.000032729
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-06-22 22:38:28.226Z | 127.783° SE | 2026-06-22 22:43:28.226Z | 89.918° E | 18.106° | 2026-06-22 22:48:28.226Z | 52.278° ENE |
| 15 mins | 2026-06-23 00:34:28.226Z | 201.904° SSW | 2026-06-23 00:41:28.226Z | 252.295° W | 44.526° | 2026-06-23 00:49:28.226Z | 17.099° NNE |
| 9 mins | 2026-06-23 02:38:28.226Z | 277.652° WNW | 2026-06-23 02:42:28.226Z | 308.351° NW | 17.367° | 2026-06-23 02:47:28.226Z | 347.484° N |
| 13 mins | 2026-06-23 08:52:28.226Z | 5.719° NNE | 2026-06-23 08:58:28.226Z | 56.884° ENE | 24.497° | 2026-06-23 09:05:28.226Z | 109.625° ESE |
| 16 mins | 2026-06-23 10:51:28.226Z | 335.049° NNW | 2026-06-23 10:58:28.226Z | 261.235° W | 43.379° | 2026-06-23 11:07:28.226Z | 174.058° S |
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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