SL-8 DEB, 21408

Orbit data source: Space-Track

SL-8 DEB, 21408 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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https://www.satcat.com/sats-embedded/21408?theme=dark&initialShowStats=false

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Identifier

21408, 1991-009BX

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

Small (<0.1 m²)

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

TLE from 2 days ago

0 SL-8 DEB
1 21408U 91009BX  26069.70731779 -.00000007  00000-0  75597-4 0  9993
2 21408  74.0233  71.4160 0204505 234.0706 245.5668 12.16003674553462

Epoch: 2026-03-10T16:58Z

TLE epoch observation values (Epoch: 2026-03-10T16:58:32.257Z)

Latitude

58.58397°

Longitude

160.59168°

Altitude

1,689.818 km

Speed

7.004 km/s

True Right ascension

14h 54m 25s

True Declination

58° 26' 55"

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

12:08:46

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,771.187 km

Perigee altitude

1,444.551 km

Semi-major axis

7,986.006 km

Eccentricity

0.02045

Inclination

74.0233°

RAAN

71.416°

Arg. of periapsis

234.0706°

True anomaly

243.45603°

Mean anomaly

245.5668°

Eccentric anomaly

244.50914°

Mean motion

3.04123 °/min

Orbital period

118.37 mins

BSTAR

0.000075597

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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.
7 mins	2026-03-12 08:24:19.817Z	14.309° NNE	2026-03-12 08:27:19.817Z	32.941° NE	12.643°	2026-03-12 08:31:19.817Z	58.587° ENE
17 mins	2026-03-12 10:23:19.817Z	350.42° N	2026-03-12 10:31:19.817Z	53.899° ENE	38.002°	2026-03-12 10:40:19.817Z	137.395° SSE
15 mins	2026-03-12 12:25:19.817Z	322.054° NNW	2026-03-12 12:32:19.817Z	264.893° W	31.321°	2026-03-12 12:40:19.817Z	201.891° SSW
16 mins	2026-03-12 23:41:19.817Z	151.009° SSE	2026-03-12 23:48:19.817Z	98.763° ESE	30.519°	2026-03-12 23:57:19.817Z	34.804° NE
18 mins	2026-03-13 01:40:19.817Z	218.695° SW	2026-03-13 01:49:19.817Z	298.884° NW	40.388°	2026-03-13 01:58:19.817Z	11.623° NNE
8 mins	2026-03-13 03:49:19.817Z	297.934° NW	2026-03-13 03:52:19.817Z	316.891° NNW	14.853°	2026-03-13 03:57:19.817Z	348.222° 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, 21408 on other resources

View SL-8 DEB, 21408 on Heavens-Above

View SL-8 DEB, 21408 on Keep Track

View SL-8 DEB, 21408 on Celestrak

View SL-8 DEB, 21408 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, 21408

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: 2026-03-10T16:58:32.257Z)

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, 21408 on other resources

Documentation

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