SL-8 DEB, 21955

Orbit data source: Space-Track

SL-8 DEB, 21955 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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https://www.satcat.com/sats-embedded/21955?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21955, 1991-009CF

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, 0.1 m

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 SL-8 DEB
1 21955U 91009CF  26070.76328369  .00000380  00000-0  42305-2 0  9997
2 21955  74.3015 207.7155 0161051 183.1070 296.6141 12.08359326543522

Epoch: 2026-03-11T18:19Z

TLE epoch observation values (Epoch: 2026-03-11T18:19:07.710Z)

Latitude

58.26074°

Longitude

-83.3728°

Altitude

1,596.898 km

Speed

7.101 km/s

True Right ascension

00h 03m 19s

True Declination

58° 07' 22"

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

10:33:31

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,770.669 km

Perigee altitude

1,512.355 km

Semi-major axis

8,019.649 km

Eccentricity

0.01611

Inclination

74.3015°

RAAN

207.7155°

Arg. of periapsis

183.107°

True anomaly

294.94936°

Mean anomaly

296.6141°

Eccentric anomaly

295.78321°

Mean motion

3.02211 °/min

Orbital period

119.12 mins

BSTAR

0.0042305

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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.
19 mins	2026-03-12 09:37:21.051Z	177.841° S	2026-03-12 09:46:21.051Z	113.185° SE	41.18°	2026-03-12 09:56:21.051Z	25.258° NE
16 mins	2026-03-12 11:41:21.051Z	243.866° WSW	2026-03-12 11:49:21.051Z	306.395° NW	29.921°	2026-03-12 11:57:21.051Z	4.272° NNE
9 mins	2026-03-12 18:07:21.051Z	14.717° NNE	2026-03-12 18:11:21.051Z	43.593° NE	17.218°	2026-03-12 18:16:21.051Z	80.135° E
16 mins	2026-03-12 20:07:21.051Z	344.998° N	2026-03-12 20:15:21.051Z	87.191° E	44.148°	2026-03-12 20:23:21.051Z	155.844° SSE
11 mins	2026-03-12 22:10:21.051Z	309.114° NW	2026-03-12 22:15:21.051Z	271.802° WNW	20.235°	2026-03-12 22:21:21.051Z	227.124° WSW

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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, 21955 on other resources

View SL-8 DEB, 21955 on Heavens-Above

View SL-8 DEB, 21955 on Keep Track

View SL-8 DEB, 21955 on Celestrak

View SL-8 DEB, 21955 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, 21955

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-03-11T18:19:07.710Z)

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, 21955 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago