SL-8 DEB, 21253

Orbit data source: Space-Track

SL-8 DEB, 21253 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/21253?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/21253?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21253, 1991-009BL

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, 0.2 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 18 hours ago

TLE from 18 hours ago

0 SL-8 DEB
1 21253U 91009BL  26171.16085696 -.00000090  00000-0 -76031-3 0  9991
2 21253  74.1149  63.2660 0147517  22.7088 129.9406 12.14612764564679

Epoch: 2026-06-20T03:51Z

TLE epoch observation values (Epoch: 2026-06-20T03:51:38.041Z)

Latitude

25.03477°

Longitude

-90.62309°

Altitude

1,695.329 km

Speed

6.996 km/s

True Right ascension

15h 42m 39s

True Declination

24° 55' 06"

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

08:46:29

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,731.859 km

Perigee altitude

1,496.065 km

Semi-major axis

7,992.099 km

Eccentricity

0.01475

Inclination

74.1149°

RAAN

63.266°

Arg. of periapsis

22.7088°

True anomaly

131.22139°

Mean anomaly

129.9406°

Eccentric anomaly

130.58251°

Mean motion

3.03775 °/min

Orbital period

118.51 mins

BSTAR

-0.00076031

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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.
6 mins	2026-06-21 01:21:29.373Z	18.623° NNE	2026-06-21 01:24:29.373Z	38.13° NE	12.434°	2026-06-21 01:27:29.373Z	57.598° ENE
17 mins	2026-06-21 03:20:29.373Z	351.741° N	2026-06-21 03:28:29.373Z	66.915° ENE	38.78°	2026-06-21 03:37:29.373Z	139.573° SSE
15 mins	2026-06-21 05:22:29.373Z	319.55° NNW	2026-06-21 05:29:29.373Z	258.618° W	31.183°	2026-06-21 05:37:29.373Z	202.244° SSW
13 mins	2026-06-21 16:41:29.373Z	148.946° SSE	2026-06-21 16:47:29.373Z	93.496° ESE	29.464°	2026-06-21 16:54:29.373Z	37.219° NE
16 mins	2026-06-21 18:40:29.373Z	223.509° SW	2026-06-21 18:47:29.373Z	286.926° WNW	37.946°	2026-06-21 18:56:29.373Z	10.799° 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, 21253 on other resources

View SL-8 DEB, 21253 on Heavens-Above

View SL-8 DEB, 21253 on Keep Track

View SL-8 DEB, 21253 on Celestrak

View SL-8 DEB, 21253 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, 21253

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 18 hours ago

TLE from 18 hours ago

TLE epoch observation values (Epoch: 2026-06-20T03:51:38.041Z)

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, 21253 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 18 hours ago