SL-8 DEB, 21184

Orbit data source: Space-Track

SL-8 DEB, 21184 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/21184?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/21184?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21184, 1991-009AX

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, 0.4 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

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Last TLE update: 9 hours ago

TLE from 9 hours ago

0 SL-8 DEB
1 21184U 91009AX  26154.89166966  .00000028  00000-0  40618-3 0  9996
2 21184  74.0235 216.8456 0132845 359.6980 112.4151 12.19112562567366

Epoch: 2026-06-03T21:24Z

TLE epoch observation values (Epoch: 2026-06-03T21:24:00.258Z)

Latitude

61.92352°

Longitude

151.21472°

Altitude

1,648.233 km

Speed

7.036 km/s

True Right ascension

00h 18m 14s

True Declination

61° 47' 47"

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

16:31:59

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,700.19 km

Perigee altitude

1,488.37 km

Semi-major axis

7,972.417 km

Eccentricity

0.01328

Inclination

74.0235°

RAAN

216.8456°

Arg. of periapsis

359.698°

True anomaly

113.81338°

Mean anomaly

112.4151°

Eccentric anomaly

113.11514°

Mean motion

3.04901 °/min

Orbital period

118.07 mins

BSTAR

0.00040618

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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.
15 mins	2026-06-04 06:46:34.139Z	243.354° WSW	2026-06-04 06:53:34.139Z	302.014° NW	29.093°	2026-06-04 07:01:34.139Z	4.939° NNE
10 mins	2026-06-04 13:08:34.139Z	16.624° NNE	2026-06-04 13:12:34.139Z	44.978° NE	17.281°	2026-06-04 13:18:34.139Z	84.517° E
17 mins	2026-06-04 15:07:34.139Z	346.664° N	2026-06-04 15:15:34.139Z	85.87° E	43.481°	2026-06-04 15:24:34.139Z	153.001° SSE
13 mins	2026-06-04 17:08:34.139Z	314.048° NW	2026-06-04 17:14:34.139Z	270.818° WNW	23.891°	2026-06-04 17:21:34.139Z	220.376° SW
15 mins	2026-06-05 04:23:34.139Z	165.092° S	2026-06-05 04:30:34.139Z	95.657° ESE	36.232°	2026-06-05 04:38:34.139Z	30.308° NE
14 mins	2026-06-05 06:24:34.139Z	238.994° WSW	2026-06-05 06:30:34.139Z	293.229° NW	32.47°	2026-06-05 06:38:34.139Z	4.776° 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, 21184 on other resources

View SL-8 DEB, 21184 on Heavens-Above

View SL-8 DEB, 21184 on Keep Track

View SL-8 DEB, 21184 on Celestrak

View SL-8 DEB, 21184 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, 21184

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-06-03T21:24:00.258Z)

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, 21184 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago