SL-8 DEB, 21407

Orbit data source: Space-Track

SL-8 DEB, 21407 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/21407?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/21407?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21407, 1991-009BW

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 21407U 91009BW  26170.45073931 -.00000025  00000-0 -83045-4 0  9994
2 21407  73.8533 343.6927 0178679  92.9264 295.6646 12.32638230586837

Epoch: 2026-06-19T10:49Z

TLE epoch observation values (Epoch: 2026-06-19T10:49:03.876Z)

Latitude

25.63037°

Longitude

-78.30807°

Altitude

1,481.366 km

Speed

7.152 km/s

True Right ascension

23h 26m 33s

True Declination

25° 30' 32"

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

23:27:18

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,677.24 km

Perigee altitude

1,394.428 km

Semi-major axis

7,913.971 km

Eccentricity

0.01787

Inclination

73.8533°

RAAN

343.6927°

Arg. of periapsis

92.9264°

True anomaly

293.8014°

Mean anomaly

295.6646°

Eccentric anomaly

294.73477°

Mean motion

3.08284 °/min

Orbital period

116.78 mins

BSTAR

-0.000083045

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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.
16 mins	2026-06-22 12:46:57.962Z	209.209° SW	2026-06-22 12:54:57.962Z	288.771° WNW	42.997°	2026-06-22 13:02:57.962Z	14.515° NNE
7 mins	2026-06-22 14:52:57.962Z	291.454° WNW	2026-06-22 14:55:57.962Z	314.314° NW	14.462°	2026-06-22 14:59:57.962Z	344.387° N
13 mins	2026-06-22 21:03:57.962Z	2.993° NNE	2026-06-22 21:09:57.962Z	57.149° ENE	27.101°	2026-06-22 21:16:57.962Z	114.979° SE
15 mins	2026-06-22 23:02:57.962Z	330.715° NNW	2026-06-22 23:09:57.962Z	247.754° W	40.685°	2026-06-22 23:17:57.962Z	180.867° SSW
6 mins	2026-06-23 10:15:57.962Z	110.246° ESE	2026-06-23 10:18:57.962Z	88.024° E	13.939°	2026-06-23 10:21:57.962Z	65.74° ENE
15 mins	2026-06-23 12:09:57.962Z	192.804° SSW	2026-06-23 12:16:57.962Z	78.097° E	44.767°	2026-06-23 12:24:57.962Z	20.88° 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, 21407 on other resources

View SL-8 DEB, 21407 on Heavens-Above

View SL-8 DEB, 21407 on Keep Track

View SL-8 DEB, 21407 on Celestrak

View SL-8 DEB, 21407 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, 21407

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: 2026-06-19T10:49:03.876Z)

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, 21407 on other resources

Documentation

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