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 (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: 8 hours ago

TLE from 8 hours ago

0 SL-8 R/B
1  3131U 68011B   26120.14380966 -.00000035  00000-0 -41935-4 0  9998
2  3131  74.0509 184.7139 0013915  35.7101 324.4915 13.18032252799026

Epoch: 2026-04-30T03:27Z

TLE epoch observation values (Epoch: 2026-04-30T03:27:05.154Z)

Latitude

-0.0001°

Longitude

-85.15225°

Altitude

1,186.141 km

Speed

7.265 km/s

True Right ascension

12h 18m 51s

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

18:34:52

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,200.532 km

Perigee altitude

1,179.47 km

Semi-major axis

7,568.138 km

Eccentricity

0.00139

Inclination

74.0509°

RAAN

184.7139°

Arg. of periapsis

35.7101°

True anomaly

324.39875°

Mean anomaly

324.4915°

Eccentric anomaly

324.44514°

Mean motion

3.29655 °/min

Orbital period

109.21 mins

BSTAR

-0.000041935

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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.
14 mins	2026-04-30 14:56:43.442Z	351.113° N	2026-04-30 15:03:43.442Z	64.259° ENE	36.893°	2026-04-30 15:10:43.442Z	138.293° SSE
11 mins	2026-04-30 16:49:43.442Z	315.93° NNW	2026-04-30 16:54:43.442Z	264.538° W	27.434°	2026-04-30 17:00:43.442Z	206.089° SW
12 mins	2026-05-01 05:03:43.442Z	181.816° SSW	2026-05-01 05:09:43.442Z	92.797° ESE	42.233°	2026-05-01 05:15:43.442Z	26.025° NE
10 mins	2026-05-01 06:56:43.442Z	257.369° W	2026-05-01 07:01:43.442Z	307.357° NW	22.684°	2026-05-01 07:06:43.442Z	353.956° 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: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-04-30T03:27:05.154Z)

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: 8 hours ago