SL-8 DEB, 21185

Orbit data source: Space-Track

SL-8 DEB, 21185 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/21185?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/21185?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21185, 1991-009AY

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)

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Last TLE update: 2 days ago

TLE from 2 days ago

0 SL-8 DEB
1 21185U 91009AY  26171.45160677 -.00000027  00000-0 -13177-3 0  9992
2 21185  74.0224 278.5568 0204149  69.8191   4.1207 12.16141295566398

Epoch: 2026-06-20T10:50Z

TLE epoch observation values (Epoch: 2026-06-20T10:50:18.824Z)

Latitude

67.70155°

Longitude

-108.68168°

Altitude

1,458.099 km

Speed

7.212 km/s

True Right ascension

21h 30m 15s

True Declination

67° 35' 29"

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

05:18:07

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,770.288 km

Perigee altitude

1,444.245 km

Semi-major axis

7,985.403 km

Eccentricity

0.02041

Inclination

74.0224°

RAAN

278.5568°

Arg. of periapsis

69.8191°

True anomaly

4.29319°

Mean anomaly

4.1207°

Eccentric anomaly

4.2065°

Mean motion

3.04157 °/min

Orbital period

118.36 mins

BSTAR

-0.00013177

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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 18:18:49.645Z	340.099° N	2026-06-22 18:26:49.645Z	318.017° NNW	44.785°	2026-06-22 18:35:49.645Z	165.309° S
8 mins	2026-06-22 20:23:49.645Z	292.949° NW	2026-06-22 20:26:49.645Z	270.783° WNW	15.877°	2026-06-22 20:31:49.645Z	237.087° WSW
15 mins	2026-06-23 07:37:49.645Z	182.387° SSW	2026-06-23 07:44:49.645Z	120.389° SE	42.463°	2026-06-23 07:52:49.645Z	25.203° NE
12 mins	2026-06-23 09:40:49.645Z	254.814° W	2026-06-23 09:46:49.645Z	305.717° NW	24.653°	2026-06-23 09:52:49.645Z	356.276° N
10 mins	2026-06-23 16:01:49.645Z	15.587° NNE	2026-06-23 16:05:49.645Z	46.62° ENE	18.495°	2026-06-23 16:11:49.645Z	90.15° ESE
14 mins	2026-06-23 18:00:49.645Z	342.713° N	2026-06-23 18:08:49.645Z	118.725° SE	44.638°	2026-06-23 18:14:49.645Z	158.752° 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, 21185 on other resources

View SL-8 DEB, 21185 on Heavens-Above

View SL-8 DEB, 21185 on Keep Track

View SL-8 DEB, 21185 on Celestrak

View SL-8 DEB, 21185 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, 21185

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: 2026-06-20T10:50:18.824Z)

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, 21185 on other resources

Documentation

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