SL-8 DEB, 21156

Orbit data source: Space-Track

SL-8 DEB, 21156 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 URL

https://www.satcat.com/sats-embedded/21156?theme=dark&initialShowStats=false

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Identifier

21156, 1991-009T

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 21156U 91009T   26154.59201588 -.00000021  00000-0 -38189-4 0  9998
2 21156  73.9151   3.4920 0147007 318.1931 104.9079 12.33873829587596

Epoch: 2026-06-03T14:12Z

TLE epoch observation values (Epoch: 2026-06-03T14:12:30.172Z)

Latitude

60.41899°

Longitude

-71.31645°

Altitude

1,574.096 km

Speed

7.073 km/s

True Right ascension

02h 15m 25s

True Declination

60° 17' 11"

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

16:30:53

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,646.805 km

Perigee altitude

1,414.279 km

Semi-major axis

7,908.679 km

Eccentricity

0.0147

Inclination

73.9151°

RAAN

3.492°

Arg. of periapsis

318.1931°

True anomaly

106.5279°

Mean anomaly

104.9079°

Eccentric anomaly

105.71869°

Mean motion

3.08594 °/min

Orbital period

116.66 mins

BSTAR

-0.000038189

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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.
11 mins	2026-06-04 13:19:27.808Z	131.29° SE	2026-06-04 13:25:27.808Z	85.995° E	19.393°	2026-06-04 13:30:27.808Z	50.04° ENE
16 mins	2026-06-04 15:15:27.808Z	202.942° SW	2026-06-04 15:22:27.808Z	250.962° W	44.328°	2026-06-04 15:31:27.808Z	17.165° NNE
10 mins	2026-06-04 17:19:27.808Z	280.231° WNW	2026-06-04 17:23:27.808Z	310.606° NW	18.389°	2026-06-04 17:29:27.808Z	353.652° N
14 mins	2026-06-04 23:32:27.808Z	4.985° NNE	2026-06-04 23:38:27.808Z	53.037° ENE	26.575°	2026-06-04 23:46:27.808Z	111.658° ESE
17 mins	2026-06-05 01:30:27.808Z	335.62° NNW	2026-06-05 01:38:27.808Z	262.128° W	43.455°	2026-06-05 01:47:27.808Z	174.907° S
6 mins	2026-06-05 03:33:27.808Z	290.978° WNW	2026-06-05 03:36:27.808Z	271.501° WNW	12.631°	2026-06-05 03:39:27.808Z	252.584° 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, 21156 on other resources

View SL-8 DEB, 21156 on Heavens-Above

View SL-8 DEB, 21156 on Keep Track

View SL-8 DEB, 21156 on Celestrak

View SL-8 DEB, 21156 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, 21156

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: 2026-06-03T14:12:30.172Z)

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, 21156 on other resources

Documentation

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