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)

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Last TLE update: 8 hours ago

TLE from 8 hours ago

0 SL-8 R/B
1  3131U 68011B   26036.80785140  .00000125  00000-0  36967-3 0  9996
2  3131  74.0529 309.8659 0014593 183.8403 176.2576 13.18033901788046

Epoch: 2026-02-05T19:23Z

TLE epoch observation values (Epoch: 2026-02-05T19:23:18.360Z)

Latitude

-0.00007°

Longitude

-116.91539°

Altitude

1,205.732 km

Speed

7.246 km/s

True Right ascension

20h 39m 27s

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

05:35:15

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,201.038 km

Perigee altitude

1,178.95 km

Semi-major axis

7,568.131 km

Eccentricity

0.00146

Inclination

74.0529°

RAAN

309.8659°

Arg. of periapsis

183.8403°

True anomaly

176.26849°

Mean anomaly

176.2576°

Eccentric anomaly

176.26305°

Mean motion

3.29655 °/min

Orbital period

109.2 mins

BSTAR

0.00036967

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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	2026-02-06 05:04:34.967Z	348.13° N	2026-02-06 05:11:34.967Z	83.014° E	41.422°	2026-02-06 05:17:34.967Z	146.996° SSE
9 mins	2026-02-06 06:57:34.967Z	308.032° NW	2026-02-06 07:01:34.967Z	270.22° WNW	21.47°	2026-02-06 07:06:34.967Z	221.846° SW
5 mins	2026-02-06 17:24:34.967Z	105.957° ESE	2026-02-06 17:26:34.967Z	88.907° E	13.058°	2026-02-06 17:29:34.967Z	64.286° ENE
13 mins	2026-02-06 19:10:34.967Z	193.827° SSW	2026-02-06 19:16:34.967Z	138.377° SSE	44.833°	2026-02-06 19:23:34.967Z	20.35° NNE
8 mins	2026-02-06 21:05:34.967Z	274.234° WNW	2026-02-06 21:08:34.967Z	302.146° NW	18.503°	2026-02-06 21:13:34.967Z	347.832° 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: 2026-02-05T19:23:18.360Z)

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