SL-8 DEB, 21163

Orbit data source: Space-Track

SL-8 DEB, 21163 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/21163?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/21163?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21163, 1991-009AA

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, 0.2 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 22 hours ago

TLE from 22 hours ago

0 SL-8 DEB
1 21163U 91009AA  26154.35188510  .00000036  00000-0  41115-3 0  9995
2 21163  73.9405 144.1538 0137761  47.3020  64.3606 12.30972115583114

Epoch: 2026-06-03T08:26Z

TLE epoch observation values (Epoch: 2026-06-03T08:26:42.872Z)

Latitude

62.21631°

Longitude

-87.27225°

Altitude

1,509.39 km

Speed

7.137 km/s

True Right ascension

19h 24m 52s

True Declination

62° 05' 16"

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

16:30:20

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,652.092 km

Perigee altitude

1,433.849 km

Semi-major axis

7,921.108 km

Eccentricity

0.01378

Inclination

73.9405°

RAAN

144.1538°

Arg. of periapsis

47.302°

True anomaly

65.79432°

Mean anomaly

64.3606°

Eccentric anomaly

65.0764°

Mean motion

3.07868 °/min

Orbital period

116.93 mins

BSTAR

0.00041115

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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.
4 mins	2026-06-04 07:50:54.726Z	25.47° NE	2026-06-04 07:52:54.726Z	39.083° NE	11.159°	2026-06-04 07:54:54.726Z	52.58° ENE
15 mins	2026-06-04 09:47:54.726Z	353.895° N	2026-06-04 09:54:54.726Z	64.494° ENE	37.738°	2026-06-04 10:02:54.726Z	136.373° SSE
14 mins	2026-06-04 11:47:54.726Z	318.606° NNW	2026-06-04 11:53:54.726Z	264.372° W	31.159°	2026-06-04 12:01:54.726Z	201.275° SSW
12 mins	2026-06-04 22:57:54.726Z	141.352° SSE	2026-06-04 23:03:54.726Z	88.713° E	24.494°	2026-06-04 23:09:54.726Z	42.095° NE
15 mins	2026-06-05 00:54:54.726Z	215.589° SW	2026-06-05 01:01:54.726Z	286.111° WNW	41.187°	2026-06-05 01:09:54.726Z	12.194° NNE
5 mins	2026-06-05 03:01:54.726Z	304.713° NW	2026-06-05 03:03:54.726Z	319.722° NNW	13.035°	2026-06-05 03:06:54.726Z	341.372° 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, 21163 on other resources

View SL-8 DEB, 21163 on Heavens-Above

View SL-8 DEB, 21163 on Keep Track

View SL-8 DEB, 21163 on Celestrak

View SL-8 DEB, 21163 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, 21163

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 22 hours ago

TLE from 22 hours ago

TLE epoch observation values (Epoch: 2026-06-03T08:26:42.872Z)

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, 21163 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 22 hours ago