SL-8 DEB, 21170

Orbit data source: Space-Track

SL-8 DEB, 21170 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/21170?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/21170?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21170, 1991-009AH

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 21170U 91009AH  26171.27557516 -.00000195  00000-0 -18564-2 0  9998
2 21170  74.1111 108.8610 0150959  83.9710  44.6665 12.12970770562683

Epoch: 2026-06-20T06:36Z

TLE epoch observation values (Epoch: 2026-06-20T06:36:49.693Z)

Latitude

47.6716°

Longitude

-96.9574°

Altitude

1,545.28 km

Speed

7.136 km/s

True Right ascension

18h 02m 58s

True Declination

47° 31' 03"

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

23:21:47

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,741.934 km

Perigee altitude

1,500.42 km

Semi-major axis

7,999.314 km

Eccentricity

0.0151

Inclination

74.1111°

RAAN

108.861°

Arg. of periapsis

83.971°

True anomaly

45.89899°

Mean anomaly

44.6665°

Eccentric anomaly

45.28109°

Mean motion

3.03364 °/min

Orbital period

118.67 mins

BSTAR

-0.0018564

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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	2026-06-22 19:22:28.440Z	146.055° SSE	2026-06-22 19:28:28.440Z	99.544° ESE	26.204°	2026-06-22 19:35:28.440Z	41.913° NE
15 mins	2026-06-22 21:22:28.440Z	218.254° SW	2026-06-22 21:29:28.440Z	293.001° NW	40.786°	2026-06-22 21:37:28.440Z	11.385° NNE
6 mins	2026-06-22 23:30:28.440Z	300.966° NW	2026-06-22 23:32:28.440Z	315.065° NNW	12.888°	2026-06-22 23:36:28.440Z	343.006° N
15 mins	2026-06-23 05:46:28.440Z	359.053° N	2026-06-23 05:53:28.440Z	68.006° E	33.174°	2026-06-23 06:01:28.440Z	129.051° SE
15 mins	2026-06-23 07:47:28.440Z	325.13° NNW	2026-06-23 07:54:28.440Z	256.375° W	35.827°	2026-06-23 08:02:28.440Z	192.678° SSW

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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, 21170 on other resources

View SL-8 DEB, 21170 on Heavens-Above

View SL-8 DEB, 21170 on Keep Track

View SL-8 DEB, 21170 on Celestrak

View SL-8 DEB, 21170 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, 21170

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: 2026-06-20T06:36:49.693Z)

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, 21170 on other resources

Documentation

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