SL-8 DEB, 21400

Orbit data source: Space-Track

SL-8 DEB, 21400 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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/21400?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/21400?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

21400, 1991-009BP

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, 0.3 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 17 hours ago

TLE from 17 hours ago

0 SL-8 DEB
1 21400U 91009BP  26070.47590111  .00000027  00000-0  32170-3 0  9994
2 21400  73.9653  84.2290 0185453 264.4659 252.4318 12.36838430507374

Epoch: 2026-03-11T11:25Z

TLE epoch observation values (Epoch: 2026-03-11T11:25:17.855Z)

Latitude

24.1008°

Longitude

-83.5857°

Altitude

1,569.104 km

Speed

7.064 km/s

True Right ascension

17h 07m 30s

True Declination

23° 59' 09"

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

09:06:01

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,664.322 km

Perigee altitude

1,371.454 km

Semi-major axis

7,896.025 km

Eccentricity

0.01855

Inclination

73.9653°

RAAN

84.229°

Arg. of periapsis

264.4659°

True anomaly

250.42028°

Mean anomaly

252.4318°

Eccentric anomaly

251.42459°

Mean motion

3.09336 °/min

Orbital period

116.38 mins

BSTAR

0.0003217

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

Other satellites on launch #9 in the year 1991 (1991-02-12 UTC)

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

SL-8 DEB Visibility forecast

Loading observer location...
Set Observer location

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.
14 mins	2026-03-12 10:27:04.966Z	359.632° N	2026-03-12 10:34:04.966Z	50.824° ENE	25.594°	2026-03-12 10:41:04.966Z	105.714° ESE
17 mins	2026-03-12 12:26:04.966Z	336.393° NNW	2026-03-12 12:34:04.966Z	258.757° W	43.819°	2026-03-12 12:43:04.966Z	173.066° S
5 mins	2026-03-12 14:29:04.966Z	289.035° WNW	2026-03-12 14:31:04.966Z	275.631° WNW	12.906°	2026-03-12 14:34:04.966Z	255.554° W
4 mins	2026-03-12 23:38:04.966Z	93.75° ESE	2026-03-12 23:40:04.966Z	80.789° E	11.545°	2026-03-12 23:42:04.966Z	68.2° E
16 mins	2026-03-13 01:29:04.966Z	181.331° SSW	2026-03-13 01:36:04.966Z	118.061° SE	42.732°	2026-03-13 01:45:04.966Z	24.716° NE
15 mins	2026-03-13 03:29:04.966Z	249.837° W	2026-03-13 03:36:04.966Z	304.491° NW	27.479°	2026-03-13 03:44:04.966Z	3.305° NNE

Items per page:

1–6 of 6 items

of 1 page

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

Check out SL-8 DEB, 21400 on other resources

View SL-8 DEB, 21400 on Heavens-Above

View SL-8 DEB, 21400 on Keep Track

View SL-8 DEB, 21400 on Celestrak

View SL-8 DEB, 21400 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, 21400

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 17 hours ago

TLE from 17 hours ago

TLE epoch observation values (Epoch: 2026-03-11T11:25:17.855Z)

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, 21400 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 17 hours ago