SL-8 DEB, 21161

Orbit data source: Space-Track

SL-8 DEB, 21161 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/21161?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/21161?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21161, 1991-009Y

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: 2 days ago

TLE from 2 days ago

0 SL-8 DEB
1 21161U 91009Y   26171.45336486  .00000005  00000-0  18932-3 0  9997
2 21161  74.0719 233.6833 0132519 258.6337 111.4664 12.19452188571089

Epoch: 2026-06-20T10:52Z

TLE epoch observation values (Epoch: 2026-06-20T10:52:50.723Z)

Latitude

11.01869°

Longitude

164.97443°

Altitude

1,636.401 km

Speed

7.037 km/s

True Right ascension

15h 47m 24s

True Declination

10° 57' 41"

Sunlit

Object was in full shadow 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

23:21:47

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,698.425 km

Perigee altitude

1,487.165 km

Semi-major axis

7,970.932 km

Eccentricity

0.01325

Inclination

74.0719°

RAAN

233.6833°

Arg. of periapsis

258.6337°

True anomaly

112.87096°

Mean anomaly

111.4664°

Eccentric anomaly

112.16955°

Mean motion

3.04986 °/min

Orbital period

118.04 mins

BSTAR

0.00018932

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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.
8 mins	2026-06-22 12:38:27.814Z	14.38° NNE	2026-06-22 12:42:27.814Z	40.295° NE	14.136°	2026-06-22 12:46:27.814Z	66.331° ENE
17 mins	2026-06-22 14:37:27.814Z	349.845° N	2026-06-22 14:45:27.814Z	62.252° ENE	40.301°	2026-06-22 14:54:27.814Z	142.862° SSE
15 mins	2026-06-22 16:38:27.814Z	320.732° NNW	2026-06-22 16:45:27.814Z	267.283° W	28.931°	2026-06-22 16:53:27.814Z	206.875° SW
15 mins	2026-06-23 03:53:27.814Z	152.902° SSE	2026-06-23 04:00:27.814Z	92.152° ESE	31.934°	2026-06-23 04:08:27.814Z	34.175° NE
17 mins	2026-06-23 05:52:27.814Z	224.157° SW	2026-06-23 06:00:27.814Z	297.093° NW	38.515°	2026-06-23 06:09:27.814Z	10.615° NNE
6 mins	2026-06-23 08:01:27.814Z	306.523° NW	2026-06-23 08:03:27.814Z	319.309° NNW	12.975°	2026-06-23 08:07:27.814Z	344.527° 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, 21161 on other resources

View SL-8 DEB, 21161 on Heavens-Above

View SL-8 DEB, 21161 on Keep Track

View SL-8 DEB, 21161 on Celestrak

View SL-8 DEB, 21161 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, 21161

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: 2026-06-20T10:52:50.723Z)

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, 21161 on other resources

Documentation

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