SL-8 DEB, 21209

Orbit data source: Space-Track

SL-8 DEB, 21209 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/21209?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/21209?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21209, 1991-009BC

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)

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

TLE from 2 days ago

0 SL-8 DEB
1 21209U 91009BC  26171.45937975 -.00000002  00000-0  10623-3 0  9997
2 21209  74.0388  68.1356 0134300 146.3625  35.1421 12.23760201573693

Epoch: 2026-06-20T11:01Z

TLE epoch observation values (Epoch: 2026-06-20T11:01:30.410Z)

Latitude

-2.42341°

Longitude

174.77535°

Altitude

1,492.017 km

Speed

7.157 km/s

True Right ascension

16h 35m 18s

True Declination

-2° 24' 37"

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

05:18:04

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,680.868 km

Perigee altitude

1,467.272 km

Semi-major axis

7,952.207 km

Eccentricity

0.01343

Inclination

74.0388°

RAAN

68.1356°

Arg. of periapsis

146.3625°

True anomaly

36.04022°

Mean anomaly

35.1421°

Eccentric anomaly

35.58992°

Mean motion

3.06064 °/min

Orbital period

117.62 mins

BSTAR

0.00010623

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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	2026-06-22 19:02:46.914Z	226.91° WSW	2026-06-22 19:11:46.914Z	305.453° NW	35.656°	2026-06-22 19:19:46.914Z	8.772° NNE
15 mins	2026-06-23 03:23:46.914Z	353.754° N	2026-06-23 03:30:46.914Z	67.051° ENE	37.611°	2026-06-23 03:38:46.914Z	137.904° SSE
13 mins	2026-06-23 05:24:46.914Z	316.396° NNW	2026-06-23 05:30:46.914Z	258.186° W	29.565°	2026-06-23 05:37:46.914Z	203.243° SW
14 mins	2026-06-23 16:36:46.914Z	149.504° SSE	2026-06-23 16:43:46.914Z	93.769° ESE	28.422°	2026-06-23 16:50:46.914Z	39.269° NE

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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, 21209 on other resources

View SL-8 DEB, 21209 on Heavens-Above

View SL-8 DEB, 21209 on Keep Track

View SL-8 DEB, 21209 on Celestrak

View SL-8 DEB, 21209 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, 21209

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: 2026-06-20T11:01:30.410Z)

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, 21209 on other resources

Documentation

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