SL-8 DEB, 21401

Orbit data source: Space-Track

SL-8 DEB, 21401 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/21401?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/21401?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21401, 1991-009BQ

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: 3 days ago

TLE from 3 days ago

0 SL-8 DEB
1 21401U 91009BQ  26170.55744005  .00000063  00000-0  76018-3 0  9997
2 21401  74.1361  21.7505 0141078 281.6344 103.0214 12.16996576566988

Epoch: 2026-06-19T13:22Z

TLE epoch observation values (Epoch: 2026-06-19T13:22:42.820Z)

Latitude

25.18625°

Longitude

-79.06982°

Altitude

1,635.063 km

Speed

7.044 km/s

True Right ascension

01h 57m 34s

True Declination

25° 04' 07"

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

08:24:43

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,716.118 km

Perigee altitude

1,490.911 km

Semi-major axis

7,981.652 km

Eccentricity

0.01411

Inclination

74.1361°

RAAN

21.7505°

Arg. of periapsis

281.6344°

True anomaly

104.59003°

Mean anomaly

103.0214°

Eccentric anomaly

103.80636°

Mean motion

3.04372 °/min

Orbital period

118.28 mins

BSTAR

0.00076018

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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.
12 mins	2026-06-22 22:41:54.862Z	3.474° NNE	2026-06-22 22:47:54.862Z	41.705° NE	18.08°	2026-06-22 22:53:54.862Z	82.452° E
17 mins	2026-06-23 00:42:54.862Z	345.538° N	2026-06-23 00:50:54.862Z	55.301° ENE	43.797°	2026-06-23 00:59:54.862Z	153.53° SSE
13 mins	2026-06-23 02:44:54.862Z	312.953° NW	2026-06-23 02:50:54.862Z	269.763° W	23.333°	2026-06-23 02:57:54.862Z	220.576° SW
16 mins	2026-06-23 13:59:54.862Z	166.738° S	2026-06-23 14:06:54.862Z	100.691° ESE	38.109°	2026-06-23 14:15:54.862Z	28.587° NE
16 mins	2026-06-23 16:00:54.862Z	239.153° WSW	2026-06-23 16:07:54.862Z	299.387° NW	32.94°	2026-06-23 16:16:54.862Z	7.626° 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, 21401 on other resources

View SL-8 DEB, 21401 on Heavens-Above

View SL-8 DEB, 21401 on Keep Track

View SL-8 DEB, 21401 on Celestrak

View SL-8 DEB, 21401 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, 21401

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2026-06-19T13:22:42.820Z)

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, 21401 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago