SL-8 DEB, 21178

Orbit data source: Space-Track

SL-8 DEB, 21178 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/21178?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/21178?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21178, 1991-009AR

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: 16 hours ago

TLE from 16 hours ago

0 SL-8 DEB
1 21178U 91009AR  26070.54701260 -.00000040  00000-0 -26162-3 0  9994
2 21178  74.0945 117.9805 0140000 120.2509 356.1204 12.16337467557485

Epoch: 2026-03-11T13:07Z

TLE epoch observation values (Epoch: 2026-03-11T13:07:41.888Z)

Latitude

59.68986°

Longitude

-97.17046°

Altitude

1,506.723 km

Speed

7.166 km/s

True Right ascension

17h 55m 51s

True Declination

59° 33' 15"

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

09:01:31

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,718.186 km

Perigee altitude

1,494.619 km

Semi-major axis

7,984.54 km

Eccentricity

0.014

Inclination

74.0945°

RAAN

117.9805°

Arg. of periapsis

120.2509°

True anomaly

356.00993°

Mean anomaly

356.1204°

Eccentric anomaly

356.06536°

Mean motion

3.04206 °/min

Orbital period

118.34 mins

BSTAR

-0.00026162

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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.
12 mins	2026-03-12 06:27:36.158Z	268.856° W	2026-03-12 06:33:36.158Z	311.678° NW	18.995°	2026-03-12 06:39:36.158Z	354.768° N
12 mins	2026-03-12 12:47:36.158Z	7.425° NNE	2026-03-12 12:52:36.158Z	49.584° ENE	24.904°	2026-03-12 12:59:36.158Z	107.446° ESE
15 mins	2026-03-12 14:47:36.158Z	334.262° NNW	2026-03-12 14:54:36.158Z	257.295° W	42.885°	2026-03-12 15:02:36.158Z	176.717° S
10 mins	2026-03-13 02:07:36.158Z	122.448° SE	2026-03-13 02:12:36.158Z	89.008° E	15.95°	2026-03-13 02:17:36.158Z	54.742° ENE
16 mins	2026-03-13 04:04:36.158Z	194.071° SSW	2026-03-13 04:12:36.158Z	44.513° NE	44.742°	2026-03-13 04:20:36.158Z	19.94° NNE

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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, 21178 on other resources

View SL-8 DEB, 21178 on Heavens-Above

View SL-8 DEB, 21178 on Keep Track

View SL-8 DEB, 21178 on Celestrak

View SL-8 DEB, 21178 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, 21178

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 16 hours ago

TLE from 16 hours ago

TLE epoch observation values (Epoch: 2026-03-11T13:07:41.888Z)

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, 21178 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 16 hours ago