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

Cyl, 2.1 m

Radar Cross Section

10.179 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 23 hours ago

TLE from 23 hours ago

0 SL-8 R/B
1 03131U 68011B   25257.44952427  .00000053  00000-0  18431-3 0  9990
2 03131  74.0524 166.6576 0013691  65.3131 294.9381 13.18022259769021

Epoch: 2025-09-14T10:47Z

TLE epoch observation values (Epoch: 2025-09-14T10:47:18.896Z)

Latitude

-0.00011°

Longitude

11.16047°

Altitude

1,190.392 km

Speed

7.261 km/s

True Right ascension

11h 06m 37s

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

02:05:15

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,200.4 km

Perigee altitude

1,179.677 km

Semi-major axis

7,568.176 km

Eccentricity

0.00137

Inclination

74.0524°

RAAN

166.6576°

Arg. of periapsis

65.3131°

True anomaly

294.79574°

Mean anomaly

294.9381°

Eccentric anomaly

294.86693°

Mean motion

3.29652 °/min

Orbital period

109.21 mins

BSTAR

0.00018431

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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.
11 mins	2025-09-15 17:51:20.294Z	148.428° SSE	2025-09-15 17:57:20.294Z	91.738° ESE	24.153°	2025-09-15 18:02:20.294Z	44.916° NE
12 mins	2025-09-15 19:42:20.294Z	220.305° SW	2025-09-15 19:48:20.294Z	305.36° NW	39.256°	2025-09-15 19:54:20.294Z	9.194° NNE
8 mins	2025-09-16 03:27:20.294Z	21.333° NNE	2025-09-16 03:30:20.294Z	49.746° ENE	18.101°	2025-09-16 03:35:20.294Z	94.155° ESE
12 mins	2025-09-16 05:17:20.294Z	339.903° N	2025-09-16 05:23:20.294Z	188.566° SSW	44.66°	2025-09-16 05:29:20.294Z	165.264° S
5 mins	2025-09-16 07:11:20.294Z	286.369° WNW	2025-09-16 07:13:20.294Z	269.047° W	13.234°	2025-09-16 07:16:20.294Z	244.239° WSW

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: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2025-09-14T10:47:18.896Z)

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: 23 hours ago