SL-8 DEB, 21722

Orbit data source: Space-Track

SL-8 DEB, 21722 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/21722?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/21722?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21722, 1991-009BY

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: 22 hours ago

TLE from 22 hours ago

0 SL-8 DEB
1 21722U 91009BY  26154.37309123  .00000010  00000-0  32728-3 0  9995
2 21722  74.0574  37.6663 0369575 297.1521 183.2721 11.77218591490319

Epoch: 2026-06-03T08:57Z

TLE epoch observation values (Epoch: 2026-06-03T08:57:15.082Z)

Latitude

56.30125°

Longitude

166.28127°

Altitude

2,094.731 km

Speed

6.737 km/s

True Right ascension

12h 49m 42s

True Declination

56° 10' 03"

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

16:27:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,084.007 km

Perigee altitude

1,480.82 km

Semi-major axis

8,160.55 km

Eccentricity

0.03696

Inclination

74.0574°

RAAN

37.6663°

Arg. of periapsis

297.1521°

True anomaly

183.04105°

Mean anomaly

183.2721°

Eccentric anomaly

183.15554°

Mean motion

2.94418 °/min

Orbital period

122.28 mins

BSTAR

0.00032728

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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	2026-06-04 14:59:32.705Z	108.212° ESE	2026-06-04 15:03:32.705Z	84.489° E	13.525°	2026-06-04 15:08:32.705Z	55.937° ENE
19 mins	2026-06-04 16:58:32.705Z	184.059° SSW	2026-06-04 17:06:32.705Z	103.827° ESE	43.786°	2026-06-04 17:17:32.705Z	22.374° NNE
16 mins	2026-06-04 19:05:32.705Z	255.808° W	2026-06-04 19:12:32.705Z	306.67° NW	27.536°	2026-06-04 19:21:32.705Z	4.615° NNE
19 mins	2026-06-05 01:38:32.705Z	356.097° N	2026-06-05 01:47:32.705Z	52.572° ENE	28.773°	2026-06-05 01:57:32.705Z	113.654° SE
21 mins	2026-06-05 03:43:32.705Z	337.172° NNW	2026-06-05 03:53:32.705Z	266.768° W	43.971°	2026-06-05 04:04:32.705Z	174.082° S
11 mins	2026-06-05 05:51:32.705Z	304.424° NW	2026-06-05 05:56:32.705Z	277.243° WNW	15.665°	2026-06-05 06:02:32.705Z	244.562° WSW

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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, 21722 on other resources

View SL-8 DEB, 21722 on Heavens-Above

View SL-8 DEB, 21722 on Keep Track

View SL-8 DEB, 21722 on Celestrak

View SL-8 DEB, 21722 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, 21722

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 22 hours ago

TLE from 22 hours ago

TLE epoch observation values (Epoch: 2026-06-03T08:57:15.082Z)

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, 21722 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 22 hours ago