SL-8 DEB, 21158

Orbit data source: Space-Track

SL-8 DEB, 21158 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/21158?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/21158?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

21158, 1991-009V

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: 13 hours ago

TLE from 13 hours ago

0 SL-8 DEB
1 21158U 91009V   26070.77559963 -.00000198  00000-0 -18588-2 0  9994
2 21158  74.1019 195.1530 0142306 208.7545 266.9405 12.13952578551705

Epoch: 2026-03-11T18:36Z

TLE epoch observation values (Epoch: 2026-03-11T18:36:51.808Z)

Latitude

61.51111°

Longitude

-104.98394°

Altitude

1,636.825 km

Speed

7.056 km/s

True Right ascension

22h 54m 40s

True Declination

61° 22' 57"

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

12:14:29

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,730.635 km

Perigee altitude

1,503.088 km

Semi-major axis

7,994.999 km

Eccentricity

0.01423

Inclination

74.1019°

RAAN

195.153°

Arg. of periapsis

208.7545°

True anomaly

265.31388°

Mean anomaly

266.9405°

Eccentric anomaly

266.12701°

Mean motion

3.0361 °/min

Orbital period

118.57 mins

BSTAR

-0.0018588

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.
15 mins	2026-03-12 07:55:02.521Z	144.732° SSE	2026-03-12 08:02:02.521Z	94.722° ESE	26.688°	2026-03-12 08:10:02.521Z	38.829° NE
18 mins	2026-03-12 09:54:02.521Z	212.49° SW	2026-03-12 10:03:02.521Z	306.293° NW	42.318°	2026-03-12 10:12:02.521Z	14.081° NNE
10 mins	2026-03-12 12:01:02.521Z	284.64° WNW	2026-03-12 12:06:02.521Z	317.159° NNW	16.291°	2026-03-12 12:11:02.521Z	349.767° N
15 mins	2026-03-12 18:20:02.521Z	359.236° N	2026-03-12 18:27:02.521Z	62.932° ENE	32.309°	2026-03-12 18:35:02.521Z	125.905° SE
15 mins	2026-03-12 20:21:02.521Z	327.032° NNW	2026-03-12 20:28:02.521Z	260.675° W	37.324°	2026-03-12 20:36:02.521Z	190.606° SSW
13 mins	2026-03-13 07:40:02.521Z	136.513° SSE	2026-03-13 07:46:02.521Z	92.54° ESE	24.61°	2026-03-13 07:53:02.521Z	43.297° NE

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, 21158 on other resources

View SL-8 DEB, 21158 on Heavens-Above

View SL-8 DEB, 21158 on Keep Track

View SL-8 DEB, 21158 on Celestrak

View SL-8 DEB, 21158 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, 21158

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-03-11T18:36:51.808Z)

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, 21158 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 13 hours ago