SL-8 R/B, 3131

Orbit data source: Space-Track

SL-8 R/B, 3131 is space debris in LEO originally from a launch on Tue, 20 Feb 1968 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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https://www.satcat.com/sats-embedded/3131?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

3131, 1968-011B

Orbit

LEO

Country

CIS

Related business

Russian Strategic Rocket Forces (RU)

Manufacturer

Yuzhnoe

Mission

Spacecraft

Bus & Motor

S3, Unknown motor

Mass

1,434 kg wet, 1,434 kg dry

Launch date (UTC)

1968-02-20 (59 years ago)

Launch vehicle

Unknown

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

CYL, 1.1 m

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 6 hours ago

TLE from 6 hours ago

0 SL-8 R/B
1  3131U 68011B   26306.85228471 -.00000035  00000-0 -41072-4 0  9996
2  3131  74.0484 264.3123 0013418  79.7259 280.5342 13.18042687823629

Epoch: 2026-11-02T20:27Z

TLE epoch observation values (Epoch: 2026-11-02T20:27:17.398Z)

Latitude

-0.00005°

Longitude

-84.63356°

Altitude

1,192.828 km

Speed

7.258 km/s

True Right ascension

17h 37m 14s

True Declination

0° 00' 00"

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

22:40:08

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,200.116 km

Perigee altitude

1,179.806 km

Semi-major axis

7,568.098 km

Eccentricity

0.00134

Inclination

74.0484°

RAAN

264.3123°

Arg. of periapsis

79.7259°

True anomaly

280.38299°

Mean anomaly

280.5342°

Eccentric anomaly

280.4586°

Mean motion

3.29658 °/min

Orbital period

109.2 mins

BSTAR

-0.000041072

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Other satellites on launch #11 in the year 1968 (1968-02-20 UTC)

COSMOS 203, 3129

SL-8 DEB, 3147 (Decayed)

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SL-8 R/B 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.
13 mins	2026-11-03 07:57:04.014Z	352.125° N	2026-11-03 08:04:04.014Z	68.248° E	46.922°	2026-11-03 08:10:04.014Z	134.506° SE
11 mins	2026-11-03 09:50:04.014Z	315.692° NNW	2026-11-03 09:55:04.014Z	261.996° W	32.338°	2026-11-03 10:01:04.014Z	204.215° SW
12 mins	2026-11-03 22:04:04.014Z	180.015° SSW	2026-11-03 22:10:04.014Z	85.888° E	62.555°	2026-11-03 22:16:04.014Z	26.311° NE
10 mins	2026-11-03 23:57:04.014Z	257.945° W	2026-11-04 00:01:04.014Z	297.336° NW	25.39°	2026-11-04 00:07:04.014Z	355.369° N

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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 R/B, 3131 on other resources

View SL-8 R/B, 3131 on Heavens-Above

View SL-8 R/B, 3131 on Keep Track

View SL-8 R/B, 3131 on Celestrak

View SL-8 R/B, 3131 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 R/B, 3131

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-11-02T20:27:17.398Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #11 in the year 1968 (1968-02-20 UTC)

SL-8 R/B Visibility forecast

Co-orbital & Co-planar RSOs

Check out SL-8 R/B, 3131 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 hours ago