SL-8 DEB, 21958
Orbit data source: Space-Track
SL-8 DEB, 21958 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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21958 intel report (Beta)
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Expand to show TLE details & historyLast TLE update: 16 hours ago
TLE from 16 hours ago
0 SL-8 DEB
1 21958U 91009CG 26154.60057865 .00000071 00000-0 83826-3 0 9997
2 21958 73.9642 233.2858 0133267 172.4318 309.8139 12.16808772565132Epoch: 2026-06-03T14:24Z
TLE epoch observation values (Epoch: 2026-06-03T14:24:49.995Z)
Latitude
55.51424°
Longitude
-79.58593°
Altitude
1,547.989 km
Speed
7.128 km/s
True Right ascension
01h 54m 43s
True Declination
55° 22' 11"
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
16:33:03
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,710.73 km
Perigee altitude
1,497.969 km
Semi-major axis
7,982.487 km
Eccentricity
0.01333
Inclination
73.9642°
RAAN
233.2858°
Arg. of periapsis
172.4318°
True anomaly
308.62831°
Mean anomaly
309.8139°
Eccentric anomaly
309.22237°
Mean motion
3.04324 °/min
Orbital period
118.3 mins
BSTAR
0.00083826
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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. |
|---|---|---|---|---|---|---|---|
| 17 mins | 2026-06-04 07:37:37.872Z | 233.696° WSW | 2026-06-04 07:45:37.872Z | 293.726° NW | 33.191° | 2026-06-04 07:54:37.872Z | 7.213° NNE |
| 7 mins | 2026-06-04 14:02:37.872Z | 21.21° NNE | 2026-06-04 14:05:37.872Z | 42.58° NE | 14.065° | 2026-06-04 14:09:37.872Z | 70.36° E |
| 16 mins | 2026-06-04 16:00:37.872Z | 347.771° N | 2026-06-04 16:08:37.872Z | 68.437° E | 41.608° | 2026-06-04 16:16:37.872Z | 146.098° SSE |
| 13 mins | 2026-06-04 18:02:37.872Z | 315.113° NNW | 2026-06-04 18:08:37.872Z | 266.723° W | 24.991° | 2026-06-04 18:15:37.872Z | 213.121° SW |
| 16 mins | 2026-06-05 05:17:37.872Z | 162.578° S | 2026-06-05 05:25:37.872Z | 96.682° ESE | 34.878° | 2026-06-05 05:33:37.872Z | 32.937° NE |
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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