SL-8 DEB, 39840

Orbit data source: Space-Track

SL-8 DEB, 39840 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/39840?theme=dark&initialShowStats=false

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Identifier

39840, 1991-009DY

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: 1 year ago

TLE from 1 year ago

0 SL-8 DEB
1 39840U 91009DY  25030.15387910  .00008157  00000-0  10455-1 0  9994
2 39840  73.7920 196.9928 0114648  45.4386  73.2587 13.60217491525516

Epoch: 2025-01-30T03:41Z

TLE epoch observation values (Epoch: 2025-01-30T03:41:35.154Z)

Latitude

56.40297°

Longitude

166.1575°

Altitude

1,020.353 km

Speed

7.359 km/s

True Right ascension

23h 24m 45s

True Declination

56° 14' 60"

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

10:44:01

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,117.593 km

Perigee altitude

947.667 km

Semi-major axis

7,410.767 km

Eccentricity

0.01146

Inclination

73.792°

RAAN

196.9928°

Arg. of periapsis

45.4386°

True anomaly

74.5219°

Mean anomaly

73.2587°

Eccentric anomaly

73.88979°

Mean motion

3.40211 °/min

Orbital period

105.82 mins

BSTAR

0.010455

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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.
4 mins	2026-03-12 11:15:49.258Z	111.139° ESE	2026-03-12 11:17:49.258Z	90.979° ESE	11.988°	2026-03-12 11:19:49.258Z	71.067° E
10 mins	2026-03-12 12:59:49.258Z	201.135° SSW	2026-03-12 13:03:49.258Z	232.123° WSW	44.518°	2026-03-12 13:09:49.258Z	17.942° NNE
4 mins	2026-03-12 14:50:49.258Z	291.774° WNW	2026-03-12 14:52:49.258Z	312.868° NW	13.024°	2026-03-12 14:54:49.258Z	333.115° NNW
11 mins	2026-03-12 22:12:49.258Z	358.449° N	2026-03-12 22:17:49.258Z	66.32° ENE	34.209°	2026-03-12 22:23:49.258Z	134.226° SE
9 mins	2026-03-13 00:00:49.258Z	311.739° NW	2026-03-13 00:04:49.258Z	262.399° W	27.339°	2026-03-13 00:09:49.258Z	205.883° SW

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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, 39840 on other resources

View SL-8 DEB, 39840 on Heavens-Above

View SL-8 DEB, 39840 on Keep Track

View SL-8 DEB, 39840 on Celestrak

View SL-8 DEB, 39840 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, 39840

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 year ago

TLE from 1 year ago

TLE epoch observation values (Epoch: 2025-01-30T03:41:35.154Z)

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, 39840 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 year ago