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

Medium (>0.1 m² and <1 m²)

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Last TLE update: 2 days ago

TLE from 2 days ago

0 SL-8 DEB
1 21955U 91009CF  26171.18739199  .00000240  00000-0  27133-2 0  9999
2 21955  74.2995  86.4114 0161365  41.5224 108.6544 12.08346522555651

Epoch: 2026-06-20T04:29Z

TLE epoch observation values (Epoch: 2026-06-20T04:29:50.667Z)

Latitude

26.9869°

Longitude

-77.64558°

Altitude

1,689.758 km

Speed

7.014 km/s

True Right ascension

17h 12m 53s

True Declination

26° 51' 51"

Sunlit

Object was in full shadow 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

02:18:49

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,770.979 km

Perigee altitude

1,512.159 km

Semi-major axis

8,019.706 km

Eccentricity

0.01614

Inclination

74.2995°

RAAN

86.4114°

Arg. of periapsis

41.5224°

True anomaly

110.39486°

Mean anomaly

108.6544°

Eccentric anomaly

109.52578°

Mean motion

3.02208 °/min

Orbital period

119.12 mins

BSTAR

0.0027133

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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.
9 mins	2026-06-22 17:24:00.780Z	121.57° SE	2026-06-22 17:28:00.780Z	92.207° ESE	17.143°	2026-06-22 17:33:00.780Z	55.084° ENE
16 mins	2026-06-22 19:21:00.780Z	199.056° SSW	2026-06-22 19:29:00.780Z	333.128° NNW	44.813°	2026-06-22 19:37:00.780Z	17.764° NNE
10 mins	2026-06-22 21:27:00.780Z	274.865° WNW	2026-06-22 21:32:00.780Z	313.269° NW	18.538°	2026-06-22 21:37:00.780Z	350.37° N
14 mins	2026-06-23 03:48:00.780Z	5.696° NNE	2026-06-23 03:54:00.780Z	54.748° ENE	26.71°	2026-06-23 04:02:00.780Z	112.965° SE
17 mins	2026-06-23 05:49:00.780Z	334.451° NNW	2026-06-23 05:56:00.780Z	273.018° WNW	42.806°	2026-06-23 06:06:00.780Z	176.692° S
4 mins	2026-06-23 07:55:00.780Z	283.348° WNW	2026-06-23 07:56:00.780Z	276.997° WNW	11.456°	2026-06-23 07:59:00.780Z	258.405° 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, 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: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T04:29:50.667Z)

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: 2 days ago