SL-8 DEB, 21175

Orbit data source: Space-Track

SL-8 DEB, 21175 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/21175?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/21175?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21175, 1991-009AN

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

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 11 hours ago

TLE from 11 hours ago

0 SL-8 DEB
1 21175U 91009AN  26071.06087310 -.00000013  00000-0  24945-4 0  9999
2 21175  73.9357 300.1124 0147301 244.6176 238.1080 12.28583556570480

Epoch: 2026-03-12T01:27Z

TLE epoch observation values (Epoch: 2026-03-12T01:27:39.435Z)

Latitude

55.28577°

Longitude

-95.95217°

Altitude

1,627.108 km

Speed

7.035 km/s

True Right ascension

06h 22m 42s

True Declination

55° 08' 32"

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

16:40:28

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,670.07 km

Perigee altitude

1,436.41 km

Semi-major axis

7,931.377 km

Eccentricity

0.01473

Inclination

73.9357°

RAAN

300.1124°

Arg. of periapsis

244.6176°

True anomaly

236.68881°

Mean anomaly

238.108°

Eccentric anomaly

237.39702°

Mean motion

3.0727 °/min

Orbital period

117.16 mins

BSTAR

0.000024945

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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.
13 mins	2026-03-12 14:34:17.357Z	133.421° SE	2026-03-12 14:41:17.357Z	85.499° E	20.047°	2026-03-12 14:47:17.357Z	46.297° ENE
17 mins	2026-03-12 16:31:17.357Z	200.732° SSW	2026-03-12 16:39:17.357Z	295.295° NW	44.826°	2026-03-12 16:48:17.357Z	17.919° NNE
12 mins	2026-03-12 18:35:17.357Z	273.836° WNW	2026-03-12 18:40:17.357Z	309.796° NW	20.357°	2026-03-12 18:47:17.357Z	357.639° N
14 mins	2026-03-13 00:50:17.357Z	0.716° NNE	2026-03-13 00:57:17.357Z	54.421° ENE	25.835°	2026-03-13 01:04:17.357Z	108.187° ESE
16 mins	2026-03-13 02:50:17.357Z	335.165° NNW	2026-03-13 02:57:17.357Z	276.213° WNW	43.252°	2026-03-13 03:06:17.357Z	174.635° S
4 mins	2026-03-13 04:54:17.357Z	283.701° WNW	2026-03-13 04:55:17.357Z	277.016° WNW	11.884°	2026-03-13 04:58:17.357Z	257.166° 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, 21175 on other resources

View SL-8 DEB, 21175 on Heavens-Above

View SL-8 DEB, 21175 on Keep Track

View SL-8 DEB, 21175 on Celestrak

View SL-8 DEB, 21175 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, 21175

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2026-03-12T01:27:39.435Z)

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, 21175 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 11 hours ago