SL-8 DEB, 21407

Orbit data source: Space-Track

SL-8 DEB, 21407 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/21407?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21407, 1991-009BW

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: 16 hours ago

TLE from 16 hours ago

0 SL-8 DEB
1 21407U 91009BW  26070.57916763  .00000105  00000-0  94758-3 0  9994
2 21407  73.8503 113.6260 0178852 236.6103 279.8620 12.32618136574523

Epoch: 2026-03-11T13:54Z

TLE epoch observation values (Epoch: 2026-03-11T13:54:00.083Z)

Latitude

24.50794°

Longitude

-91.66454°

Altitude

1,518.713 km

Speed

7.118 km/s

True Right ascension

19h 04m 18s

True Declination

24° 23' 27"

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

10:29:33

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,677.464 km

Perigee altitude

1,394.375 km

Semi-major axis

7,914.057 km

Eccentricity

0.01789

Inclination

73.8503°

RAAN

113.626°

Arg. of periapsis

236.6103°

True anomaly

277.83545°

Mean anomaly

279.862°

Eccentric anomaly

278.84945°

Mean motion

3.08279 °/min

Orbital period

116.78 mins

BSTAR

0.00094758

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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.
8 mins	2026-03-12 06:50:23.603Z	293.759° NW	2026-03-12 06:54:23.603Z	319.194° NNW	13.944°	2026-03-12 06:58:23.603Z	345.026° N
15 mins	2026-03-12 13:02:23.603Z	356.419° N	2026-03-12 13:09:23.603Z	60.269° ENE	34.452°	2026-03-12 13:17:23.603Z	129.082° SE
15 mins	2026-03-12 15:01:23.603Z	325.993° NNW	2026-03-12 15:08:23.603Z	266.532° W	35.169°	2026-03-12 15:16:23.603Z	194.565° SSW
12 mins	2026-03-13 02:10:23.603Z	132.09° SE	2026-03-13 02:16:23.603Z	87.319° E	22.396°	2026-03-13 02:22:23.603Z	46.174° ENE
17 mins	2026-03-13 04:06:23.603Z	205.316° SW	2026-03-13 04:14:23.603Z	300.671° NW	44.286°	2026-03-13 04:23:23.603Z	16.686° 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, 21407 on other resources

View SL-8 DEB, 21407 on Heavens-Above

View SL-8 DEB, 21407 on Keep Track

View SL-8 DEB, 21407 on Celestrak

View SL-8 DEB, 21407 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, 21407

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: 2026-03-11T13:54:00.083Z)

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, 21407 on other resources

Documentation

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