SL-8 DEB, 21936

Orbit data source: Space-Track

SL-8 DEB, 21936 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/21936?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/21936?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21936, 1991-009CD

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: 19 hours ago

TLE from 19 hours ago

0 SL-8 DEB
1 21936U 91009CD  26171.11128176  .00000110  00000-0  13665-2 0  9999
2 21936  74.0654  58.5024 0263038 193.0944 320.7714 12.01229382509104

Epoch: 2026-06-20T02:40Z

TLE epoch observation values (Epoch: 2026-06-20T02:40:14.744Z)

Latitude

26.96231°

Longitude

-78.19949°

Altitude

1,516.303 km

Speed

7.18 km/s

True Right ascension

15h 20m 46s

True Declination

26° 50' 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

1,885.03 km

Perigee altitude

1,461.466 km

Semi-major axis

8,051.385 km

Eccentricity

0.0263

Inclination

74.0654°

RAAN

58.5024°

Arg. of periapsis

193.0944°

True anomaly

318.81579°

Mean anomaly

320.7714°

Eccentric anomaly

319.7986°

Mean motion

3.00426 °/min

Orbital period

119.83 mins

BSTAR

0.0013665

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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.
15 mins	2026-06-21 02:24:29.286Z	355.289° N	2026-06-21 02:32:29.286Z	56.815° ENE	29.157°	2026-06-21 02:39:29.286Z	115.676° SE
16 mins	2026-06-21 04:27:29.286Z	331.549° NNW	2026-06-21 04:35:29.286Z	254.13° W	39.81°	2026-06-21 04:43:29.286Z	184.342° SSW
15 mins	2026-06-21 15:53:29.286Z	139.301° SSE	2026-06-21 16:00:29.286Z	93.486° ESE	24.939°	2026-06-21 16:08:29.286Z	41.111° NE
20 mins	2026-06-21 17:52:29.286Z	206.291° SW	2026-06-21 18:02:29.286Z	302.948° NW	43.857°	2026-06-21 18:12:29.286Z	16.266° NNE
13 mins	2026-06-21 20:00:29.286Z	275.295° WNW	2026-06-21 20:06:29.286Z	312.795° NW	18.872°	2026-06-21 20:13:29.286Z	357.115° N

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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, 21936 on other resources

View SL-8 DEB, 21936 on Heavens-Above

View SL-8 DEB, 21936 on Keep Track

View SL-8 DEB, 21936 on Celestrak

View SL-8 DEB, 21936 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, 21936

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 19 hours ago

TLE from 19 hours ago

TLE epoch observation values (Epoch: 2026-06-20T02:40:14.744Z)

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, 21936 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 19 hours ago