SL-8 DEB, 21154

Orbit data source: Space-Track

SL-8 DEB, 21154 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/21154?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/21154?theme=dark&initialShowStats=false

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Identifier

21154, 1991-009R

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, 0.2 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

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Last TLE update: 2 days ago

TLE from 2 days ago

0 SL-8 DEB
1 21154U 91009R   26171.45720939 -.00000055  00000-0 -47453-3 0  9996
2 21154  74.2563 249.4577 0193127 324.7357  34.1015 12.01331953 50214

Epoch: 2026-06-20T10:58Z

TLE epoch observation values (Epoch: 2026-06-20T10:58:22.891Z)

Latitude

0.00002°

Longitude

176.19077°

Altitude

1,549.402 km

Speed

7.148 km/s

True Right ascension

16h 37m 49s

True Declination

0° 00' 00"

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

02:30:10

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,828.261 km

Perigee altitude

1,517.291 km

Semi-major axis

8,050.913 km

Eccentricity

0.01931

Inclination

74.2563°

RAAN

249.4577°

Arg. of periapsis

324.7357°

True anomaly

35.36747°

Mean anomaly

34.1015°

Eccentric anomaly

34.73194°

Mean motion

3.00452 °/min

Orbital period

119.82 mins

BSTAR

-0.00047453

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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.
19 mins	2026-06-22 15:31:20.782Z	348.607° N	2026-06-22 15:41:20.782Z	69.028° E	39.3°	2026-06-22 15:50:20.782Z	139.043° SSE
17 mins	2026-06-22 17:35:20.782Z	323.408° NNW	2026-06-22 17:43:20.782Z	262.393° W	32.388°	2026-06-22 17:52:20.782Z	201.428° SSW
15 mins	2026-06-23 05:01:20.782Z	155.717° SSE	2026-06-23 05:08:20.782Z	91.668° ESE	33.064°	2026-06-23 05:16:20.782Z	32.743° NE
17 mins	2026-06-23 07:02:20.782Z	227.766° WSW	2026-06-23 07:10:20.782Z	300.751° NW	36.703°	2026-06-23 07:19:20.782Z	9.952° NNE
4 mins	2026-06-23 09:14:20.782Z	315.86° NNW	2026-06-23 09:16:20.782Z	328.44° NNW	11.687°	2026-06-23 09:18:20.782Z	340.684° N
9 mins	2026-06-23 13:31:20.782Z	17.034° NNE	2026-06-23 13:35:20.782Z	42.216° NE	15.235°	2026-06-23 13:40:20.782Z	72.155° E

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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, 21154 on other resources

View SL-8 DEB, 21154 on Heavens-Above

View SL-8 DEB, 21154 on Keep Track

View SL-8 DEB, 21154 on Celestrak

View SL-8 DEB, 21154 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, 21154

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T10:58:22.891Z)

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, 21154 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago