SL-8 DEB, 21184

Orbit data source: Space-Track

SL-8 DEB, 21184 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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<iframe src="https://www.satcat.com/sats-embedded/21184?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/21184?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21184, 1991-009AX

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, 0.4 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

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Last TLE update: 8 hours ago

TLE from 8 hours ago

0 SL-8 DEB
1 21184U 91009AX  26070.86212887 -.00000025  00000-0 -10787-3 0  9997
2 21184  74.0272 322.2570 0132377 119.2834 322.7612 12.19111569557121

Epoch: 2026-03-11T20:41Z

TLE epoch observation values (Epoch: 2026-03-11T20:41:27.934Z)

Latitude

71.8567°

Longitude

-97.26144°

Altitude

1,524.926 km

Speed

7.147 km/s

True Right ascension

01h 30m 30s

True Declination

71° 45' 53"

Sunlit

Object was in daylight 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

09:02:39

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,699.821 km

Perigee altitude

1,488.748 km

Semi-major axis

7,972.421 km

Eccentricity

0.01324

Inclination

74.0272°

RAAN

322.257°

Arg. of periapsis

119.2834°

True anomaly

321.83104°

Mean anomaly

322.7612°

Eccentric anomaly

322.29735°

Mean motion

3.049 °/min

Orbital period

118.07 mins

BSTAR

-0.00010787

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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.
16 mins	2026-03-12 04:44:43.475Z	332.246° NNW	2026-03-12 04:52:43.475Z	264.192° W	39.32°	2026-03-12 05:00:43.475Z	185.768° SSW
10 mins	2026-03-12 16:04:43.475Z	124.433° SE	2026-03-12 16:08:43.475Z	94.761° ESE	19.552°	2026-03-12 16:14:43.475Z	50.543° ENE
16 mins	2026-03-12 18:00:43.475Z	202.129° SSW	2026-03-12 18:08:43.475Z	293.175° NW	44.647°	2026-03-12 18:16:43.475Z	16.82° NNE
11 mins	2026-03-12 20:05:43.475Z	274.903° WNW	2026-03-12 20:10:43.475Z	311.315° NW	18.203°	2026-03-12 20:16:43.475Z	354.318° N
13 mins	2026-03-13 02:23:43.475Z	5.784° NNE	2026-03-13 02:29:43.475Z	58.474° ENE	25.667°	2026-03-13 02:36:43.475Z	112.208° ESE
15 mins	2026-03-13 04:23:43.475Z	333.247° NNW	2026-03-13 04:30:43.475Z	253.765° W	42.38°	2026-03-13 04:38:43.475Z	177.96° S

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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, 21184 on other resources

View SL-8 DEB, 21184 on Heavens-Above

View SL-8 DEB, 21184 on Keep Track

View SL-8 DEB, 21184 on Celestrak

View SL-8 DEB, 21184 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, 21184

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-03-11T20:41:27.934Z)

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, 21184 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago