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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https://www.satcat.com/sats-embedded/21958?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21958, 1991-009CG

Orbit

LEO

Country

CIS

Related business

Russian Strategic Rocket Forces (RU)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1991-02-12 (35 years ago)

Launch vehicle

Unknown

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.1 m

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 1 day ago

TLE from 1 day ago

0 SL-8 DEB
1 21958U 91009CG  26070.17935252 -.00000081  00000-0 -63937-3 0  9995
2 21958  73.9690 339.1104 0133680 290.6802 222.7368 12.16805387554869

Epoch: 2026-03-11T04:18Z

TLE epoch observation values (Epoch: 2026-03-11T04:18:16.057Z)

Latitude

26.48767°

Longitude

-82.49615°

Altitude

1,688.241 km

Speed

6.998 km/s

True Right ascension

10h 03m 40s

True Declination

26° 21' 59"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

09:02:59

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,711.074 km

Perigee altitude

1,497.654 km

Semi-major axis

7,982.501 km

Eccentricity

0.01337

Inclination

73.969°

RAAN

339.1104°

Arg. of periapsis

290.6802°

True anomaly

221.7099°

Mean anomaly

222.7368°

Eccentric anomaly

222.22209°

Mean motion

3.04323 °/min

Orbital period

118.3 mins

BSTAR

-0.00063937

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Other satellites on launch #9 in the year 1991 (1991-02-12 UTC)

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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.
18 mins	2026-03-12 05:44:03.820Z	333.368° NNW	2026-03-12 05:53:03.820Z	257.412° W	40.97°	2026-03-12 06:02:03.820Z	182.547° SSW
10 mins	2026-03-12 17:05:03.820Z	120.697° SE	2026-03-12 17:09:03.820Z	91.266° ESE	19.298°	2026-03-12 17:15:03.820Z	49.852° ENE
17 mins	2026-03-12 19:01:03.820Z	200.207° SSW	2026-03-12 19:09:03.820Z	316.109° NNW	44.834°	2026-03-12 19:18:03.820Z	18.155° NNE
12 mins	2026-03-12 21:06:03.820Z	273.775° WNW	2026-03-12 21:11:03.820Z	309.902° NW	20.279°	2026-03-12 21:18:03.820Z	357.675° N
15 mins	2026-03-13 03:25:03.820Z	2.231° NNE	2026-03-13 03:32:03.820Z	57.492° ENE	27.722°	2026-03-13 03:40:03.820Z	114.099° SE

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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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Check out SL-8 DEB, 21958 on other resources

View SL-8 DEB, 21958 on Heavens-Above

View SL-8 DEB, 21958 on Keep Track

View SL-8 DEB, 21958 on Celestrak

View SL-8 DEB, 21958 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

SL-8 DEB, 21958

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-03-11T04:18:16.057Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #9 in the year 1991 (1991-02-12 UTC)

SL-8 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out SL-8 DEB, 21958 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago