SL-8 DEB, 21164

Orbit data source: Space-Track

SL-8 DEB, 21164 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/21164?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/21164?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21164, 1991-009AB

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: 2 days ago

TLE from 2 days ago

0 SL-8 DEB
1 21164U 91009AB  26171.32560941  .00000009  00000-0  21782-3 0  9992
2 21164  74.0442 126.7552 0126140 199.5339 314.2593 12.22032362573148

Epoch: 2026-06-20T07:48Z

TLE epoch observation values (Epoch: 2026-06-20T07:48:52.653Z)

Latitude

26.15941°

Longitude

-87.03926°

Altitude

1,516.923 km

Speed

7.14 km/s

True Right ascension

19h 54m 53s

True Declination

26° 02' 12"

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

02:30:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,681.971 km

Perigee altitude

1,481.164 km

Semi-major axis

7,959.705 km

Eccentricity

0.01261

Inclination

74.0442°

RAAN

126.7552°

Arg. of periapsis

199.5339°

True anomaly

313.21262°

Mean anomaly

314.2593°

Eccentric anomaly

313.73711°

Mean motion

3.05631 °/min

Orbital period

117.79 mins

BSTAR

0.00021782

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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	2026-06-22 20:00:21.447Z	122.988° SE	2026-06-22 20:05:21.447Z	89.333° E	17.932°	2026-06-22 20:11:21.447Z	49.885° ENE
17 mins	2026-06-22 21:56:21.447Z	195.86° SSW	2026-06-22 22:04:21.447Z	153.204° SSE	44.995°	2026-06-22 22:13:21.447Z	19.346° NNE
12 mins	2026-06-23 00:00:21.447Z	267.716° W	2026-06-23 00:06:21.447Z	312.047° NW	21.772°	2026-06-23 00:12:21.447Z	354.919° N
13 mins	2026-06-23 06:18:21.447Z	4.434° NNE	2026-06-23 06:24:21.447Z	51.113° ENE	23.563°	2026-06-23 06:31:21.447Z	104.789° ESE
16 mins	2026-06-23 08:18:21.447Z	337.003° NNW	2026-06-23 08:25:21.447Z	279.972° WNW	43.996°	2026-06-23 08:34:21.447Z	171.354° S
5 mins	2026-06-23 10:22:21.447Z	287.965° WNW	2026-06-23 10:24:21.447Z	273.983° WNW	12.583°	2026-06-23 10:27:21.447Z	253.339° W

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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, 21164 on other resources

View SL-8 DEB, 21164 on Heavens-Above

View SL-8 DEB, 21164 on Keep Track

View SL-8 DEB, 21164 on Celestrak

View SL-8 DEB, 21164 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, 21164

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: 2026-06-20T07:48:52.653Z)

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, 21164 on other resources

Documentation

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