SL-8 DEB, 21187

Orbit data source: Space-Track

SL-8 DEB, 21187 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/21187?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/21187?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21187, 1991-009BA

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

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 23 hours ago

TLE from 23 hours ago

0 SL-8 DEB
1 21187U 91009BA  26170.95563728 -.00000335  00000-0 -33896-2 0  9993
2 21187  74.2470 352.4874 0179352  41.8308 110.3083 12.09407228557647

Epoch: 2026-06-19T22:56Z

TLE epoch observation values (Epoch: 2026-06-19T22:56:07.060Z)

Latitude

24.93625°

Longitude

-87.21943°

Altitude

1,693.672 km

Speed

7.008 km/s

True Right ascension

10h 59m 56s

True Declination

24° 49' 13"

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

08:46:29

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,780.631 km

Perigee altitude

1,493.129 km

Semi-major axis

8,015.017 km

Eccentricity

0.01794

Inclination

74.247°

RAAN

352.4874°

Arg. of periapsis

41.8308°

True anomaly

112.22053°

Mean anomaly

110.3083°

Eccentric anomaly

111.26594°

Mean motion

3.02473 °/min

Orbital period

119.02 mins

BSTAR

-0.0033896

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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.
17 mins	2026-06-20 22:30:29.712Z	351.965° N	2026-06-20 22:38:29.712Z	58.714° ENE	36.837°	2026-06-20 22:47:29.712Z	135.105° SSE
15 mins	2026-06-21 00:33:29.712Z	321.493° NNW	2026-06-21 00:40:29.712Z	257.471° W	33.153°	2026-06-21 00:48:29.712Z	199.058° SSW
13 mins	2026-06-21 11:55:29.712Z	148.997° SSE	2026-06-21 12:01:29.712Z	97.375° ESE	28.45°	2026-06-21 12:08:29.712Z	38.783° NE
15 mins	2026-06-21 13:55:29.712Z	222.545° SW	2026-06-21 14:02:29.712Z	290.551° WNW	38.561°	2026-06-21 14:10:29.712Z	9.218° NNE

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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, 21187 on other resources

View SL-8 DEB, 21187 on Heavens-Above

View SL-8 DEB, 21187 on Keep Track

View SL-8 DEB, 21187 on Celestrak

View SL-8 DEB, 21187 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, 21187

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2026-06-19T22:56:07.060Z)

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, 21187 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 23 hours ago