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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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 (58 years ago)

Launch vehicle

Unknown

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 5 hours ago

TLE from 5 hours ago

0 SL-8 R/B
1  3131U 68011B   25336.15600728 -.00000215  00000-0 -50136-3 0  9990
2  3131  74.0529  48.4601 0015385 291.4297  68.5150 13.18026143779395

Epoch: 2025-12-02T03:44Z

TLE epoch observation values (Epoch: 2025-12-02T03:44:39.028Z)

Latitude

-0.00004°

Longitude

-78.94774°

Altitude

1,190.485 km

Speed

7.261 km/s

True Right ascension

03h 13m 50s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

06:56:43

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,201.667 km

Perigee altitude

1,178.38 km

Semi-major axis

7,568.161 km

Eccentricity

0.00154

Inclination

74.0529°

RAAN

48.4601°

Arg. of periapsis

291.4297°

True anomaly

68.67916°

Mean anomaly

68.515°

Eccentric anomaly

68.59707°

Mean motion

3.29653 °/min

Orbital period

109.21 mins

BSTAR

-0.00050136

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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	2025-12-02 15:14:18.977Z	357.602° N	2025-12-02 15:20:18.977Z	53.212° ENE	29.12°	2025-12-02 15:27:18.977Z	123.338° SE
11 mins	2025-12-02 17:07:18.977Z	322.75° NNW	2025-12-02 17:12:18.977Z	259.209° W	36.131°	2025-12-02 17:18:18.977Z	191.549° SSW
12 mins	2025-12-03 05:21:18.977Z	164.363° S	2025-12-03 05:26:18.977Z	109.927° ESE	34.709°	2025-12-03 05:33:18.977Z	32.52° NE
11 mins	2025-12-03 07:13:18.977Z	242.709° WSW	2025-12-03 07:18:18.977Z	300.149° NW	30.226°	2025-12-03 07:24:18.977Z	1.265° 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 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: 5 hours ago

TLE from 5 hours ago

TLE epoch observation values (Epoch: 2025-12-02T03:44:39.028Z)

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: 5 hours ago