SL-8 DEB, 21165

Orbit data source: Space-Track

SL-8 DEB, 21165 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/21165?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/21165?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21165, 1991-009AC

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)

Expand to show TLE details & history
Last TLE update: 7 hours ago

TLE from 7 hours ago

0 SL-8 DEB
1 21165U 91009AC  26070.97797610  .00000107  00000-0  12327-2 0  9990
2 21165  74.1628 305.5147 0160407 185.1520 296.9599 12.12150252549299

Epoch: 2026-03-11T23:28Z

TLE epoch observation values (Epoch: 2026-03-11T23:28:17.135Z)

Latitude

56.12169°

Longitude

-61.05378°

Altitude

1,579.308 km

Speed

7.109 km/s

True Right ascension

06h 42m 36s

True Declination

55° 58' 44"

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

10:28:22

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,753.157 km

Perigee altitude

1,496.412 km

Semi-major axis

8,002.921 km

Eccentricity

0.01604

Inclination

74.1628°

RAAN

305.5147°

Arg. of periapsis

185.152°

True anomaly

295.30674°

Mean anomaly

296.9599°

Eccentric anomaly

296.1348°

Mean motion

3.03159 °/min

Orbital period

118.75 mins

BSTAR

0.0012327

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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.
11 mins	2026-03-12 14:46:12.326Z	124.514° SE	2026-03-12 14:52:12.326Z	84.947° E	18.261°	2026-03-12 14:57:12.326Z	52.346° ENE
18 mins	2026-03-12 16:43:12.326Z	195.7° SSW	2026-03-12 16:51:12.326Z	191.595° SSW	44.829°	2026-03-12 17:01:12.326Z	19.239° NNE
13 mins	2026-03-12 18:48:12.326Z	266.098° W	2026-03-12 18:54:12.326Z	308.395° NW	22.017°	2026-03-12 19:01:12.326Z	357.28° N
12 mins	2026-03-13 01:10:12.326Z	6.944° NNE	2026-03-13 01:16:12.326Z	56.562° ENE	24.345°	2026-03-13 01:22:12.326Z	103.779° ESE
16 mins	2026-03-13 03:10:12.326Z	336.407° NNW	2026-03-13 03:18:12.326Z	247.267° WSW	43.62°	2026-03-13 03:26:12.326Z	174.098° S

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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, 21165 on other resources

View SL-8 DEB, 21165 on Heavens-Above

View SL-8 DEB, 21165 on Keep Track

View SL-8 DEB, 21165 on Celestrak

View SL-8 DEB, 21165 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, 21165

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 7 hours ago

TLE from 7 hours ago

TLE epoch observation values (Epoch: 2026-03-11T23:28:17.135Z)

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, 21165 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 7 hours ago