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)

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Last TLE update: 9 hours ago

TLE from 9 hours ago

0 SL-8 R/B
1 03131U 68011B   26175.16976681 -.00000048  00000-0 -72421-4 0  9993
2 03131  74.0501 102.0796 0014924 302.8665  57.0987 13.18030680806271

Epoch: 2026-06-24T04:04Z

TLE epoch observation values (Epoch: 2026-06-24T04:04:27.852Z)

Latitude

0°

Longitude

128.63272°

Altitude

1,188.592 km

Speed

7.263 km/s

True Right ascension

06h 48m 19s

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

23:48:29

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,201.301 km

Perigee altitude

1,178.712 km

Semi-major axis

7,568.144 km

Eccentricity

0.00149

Inclination

74.0501°

RAAN

102.0796°

Arg. of periapsis

302.8665°

True anomaly

57.24243°

Mean anomaly

57.0987°

Eccentric anomaly

57.17055°

Mean motion

3.29655 °/min

Orbital period

109.21 mins

BSTAR

-0.000072421

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

SL-8 DEB, 3147 (Decayed)

COSMOS 203, 3129

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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.
9 mins	2026-06-24 18:46:13.842Z	130.013° SE	2026-06-24 18:50:13.842Z	94.866° ESE	17.89°	2026-06-24 18:55:13.842Z	51.463° ENE
13 mins	2026-06-24 20:35:13.842Z	206.056° SW	2026-06-24 20:41:13.842Z	306.148° NW	43.973°	2026-06-24 20:48:13.842Z	15.853° NNE
6 mins	2026-06-24 22:31:13.842Z	288.95° WNW	2026-06-24 22:34:13.842Z	315.597° NNW	14.553°	2026-06-24 22:37:13.842Z	340.883° N
5 mins	2026-06-25 04:21:13.842Z	29.299° NE	2026-06-25 04:23:13.842Z	46.669° ENE	13.921°	2026-06-25 04:26:13.842Z	72.271° E
13 mins	2026-06-25 06:10:13.842Z	346.988° N	2026-06-25 06:16:13.842Z	71.093° E	43.443°	2026-06-25 06:23:13.842Z	153.084° SSE
8 mins	2026-06-25 08:03:13.842Z	301.047° NW	2026-06-25 08:07:13.842Z	262.641° W	19.157°	2026-06-25 08:11:13.842Z	227.233° WSW

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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: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-06-24T04:04:27.852Z)

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: 9 hours ago