SL-8 DEB, 21186
Orbit data source: Space-Track
SL-8 DEB, 21186 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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21186 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, 0.1 m
Radar Cross Section
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 5 hours ago
TLE from 5 hours ago
0 SL-8 DEB
1 21186U 91009AZ 26071.19161787 .00000232 00000-0 25111-2 0 9992
2 21186 74.1010 229.0886 0147919 241.8615 307.4904 12.13104572550245Epoch: 2026-03-12T04:35Z
TLE epoch observation values (Epoch: 2026-03-12T04:35:55.783Z)
Latitude
-7.8251°
Longitude
172.49363°
Altitude
1,555.489 km
Speed
7.121 km/s
True Right ascension
03h 25m 17s
True Declination
-7° 47' 01"
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
13:56:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,738.905 km
Perigee altitude
1,502.273 km
Semi-major axis
7,998.726 km
Eccentricity
0.01479
Inclination
74.101°
RAAN
229.0886°
Arg. of periapsis
241.8615°
True anomaly
306.1303°
Mean anomaly
307.4904°
Eccentric anomaly
306.81187°
Mean motion
3.03397 °/min
Orbital period
118.66 mins
BSTAR
0.0025111
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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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-03-12 09:36:43.253Z | 121.939° SE | 2026-03-12 09:42:43.253Z | 83.781° E | 16.443° | 2026-03-12 09:47:43.253Z | 52.647° ENE |
| 18 mins | 2026-03-12 11:33:43.253Z | 191.7° SSW | 2026-03-12 11:41:43.253Z | 126.539° SE | 44.778° | 2026-03-12 11:51:43.253Z | 20.575° NNE |
| 14 mins | 2026-03-12 13:37:43.253Z | 260.845° W | 2026-03-12 13:44:43.253Z | 311.617° NW | 23.882° | 2026-03-12 13:51:43.253Z | 359.391° N |
| 14 mins | 2026-03-12 19:59:43.253Z | 4.045° NNE | 2026-03-12 20:05:43.253Z | 47.754° ENE | 24.136° | 2026-03-12 20:13:43.253Z | 105.705° ESE |
| 18 mins | 2026-03-12 21:59:43.253Z | 338.308° N | 2026-03-12 22:08:43.253Z | 238.171° WSW | 44.426° | 2026-03-12 22:17:43.253Z | 170.144° S |
| 7 mins | 2026-03-13 00:04:43.253Z | 295.747° NW | 2026-03-13 00:07:43.253Z | 275.805° WNW | 14.299° | 2026-03-13 00:11:43.253Z | 249.112° W |
| 8 mins | 2026-03-13 09:23:43.253Z | 108.491° ESE | 2026-03-13 09:27:43.253Z | 82.51° E | 14.833° | 2026-03-13 09:31:43.253Z | 57.704° ENE |
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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