SL-8 DEB, 21724

Orbit data source: Space-Track

SL-8 DEB, 21724 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/21724?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/21724?theme=dark&initialShowStats=false

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Identifier

21724, 1991-009BZ

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)

Expand to show TLE details & history
Last TLE update: 3 days ago

TLE from 3 days ago

0 SL-8 DEB
1 21724U 91009BZ  26152.37114424  .00000019  00000-0  30144-3 0  9992
2 21724  73.9768 134.8939 0206052   3.2945 147.3668 12.20619521544695

Epoch: 2026-06-01T08:54Z

TLE epoch observation values (Epoch: 2026-06-01T08:54:26.862Z)

Latitude

26.94904°

Longitude

-76.93284°

Altitude

1,731.858 km

Speed

6.953 km/s

True Right ascension

20h 26m 09s

True Declination

26° 49' 37"

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

17:44:29

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,751.854 km

Perigee altitude

1,423.578 km

Semi-major axis

7,965.853 km

Eccentricity

0.02061

Inclination

73.9768°

RAAN

134.8939°

Arg. of periapsis

3.2945°

True anomaly

148.61294°

Mean anomaly

147.3668°

Eccentric anomaly

147.99255°

Mean motion

3.05277 °/min

Orbital period

117.93 mins

BSTAR

0.00030144

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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.
18 mins	2026-06-04 09:26:52.333Z	345.098° N	2026-06-04 09:35:52.333Z	73.86° E	43.536°	2026-06-04 09:44:52.333Z	152.183° SSE
14 mins	2026-06-04 11:28:52.333Z	314.635° NW	2026-06-04 11:35:52.333Z	262.945° W	24.526°	2026-06-04 11:42:52.333Z	216.793° SW
14 mins	2026-06-04 22:43:52.333Z	161.853° S	2026-06-04 22:49:52.333Z	101.014° ESE	35.235°	2026-06-04 22:57:52.333Z	31.327° NE
14 mins	2026-06-05 00:43:52.333Z	237.125° WSW	2026-06-05 00:50:52.333Z	306.522° NW	32.679°	2026-06-05 00:57:52.333Z	5.085° NNE
9 mins	2026-06-05 07:04:52.333Z	16.759° NNE	2026-06-05 07:08:52.333Z	43.417° NE	14.755°	2026-06-05 07:13:52.333Z	74.706° E

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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, 21724 on other resources

View SL-8 DEB, 21724 on Heavens-Above

View SL-8 DEB, 21724 on Keep Track

View SL-8 DEB, 21724 on Celestrak

View SL-8 DEB, 21724 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, 21724

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2026-06-01T08:54:26.862Z)

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, 21724 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago