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: 23 hours ago

TLE from 23 hours ago

0 SL-8 R/B
1 03131U 68011B   26168.11125774 -.00000019  00000-0  16540-5 0  9997
2 03131  74.0495 112.6792 0014853 314.3961  45.5911 13.18030716805340

Epoch: 2026-06-17T02:40Z

TLE epoch observation values (Epoch: 2026-06-17T02:40:12.668Z)

Latitude

-0.00001°

Longitude

167.25278°

Altitude

1,186.857 km

Speed

7.264 km/s

True Right ascension

07h 30m 43s

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

12:04:48

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,201.248 km

Perigee altitude

1,178.766 km

Semi-major axis

7,568.144 km

Eccentricity

0.00149

Inclination

74.0495°

RAAN

112.6792°

Arg. of periapsis

314.3961°

True anomaly

45.71284°

Mean anomaly

45.5911°

Eccentric anomaly

45.65196°

Mean motion

3.29655 °/min

Orbital period

109.21 mins

BSTAR

0.000001654

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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.
12 mins	2026-06-18 06:34:04.277Z	358.52° N	2026-06-18 06:40:04.277Z	60.88° ENE	31.02°	2026-06-18 06:46:04.277Z	123.888° SE
12 mins	2026-06-18 08:26:04.277Z	322.934° NNW	2026-06-18 08:31:04.277Z	269.579° W	33.993°	2026-06-18 08:38:04.277Z	193.093° SSW
12 mins	2026-06-18 20:40:04.277Z	169.735° S	2026-06-18 20:46:04.277Z	99.673° ESE	36.799°	2026-06-18 20:52:04.277Z	32.459° NE
11 mins	2026-06-18 22:33:04.277Z	248.484° W	2026-06-18 22:38:04.277Z	307.361° NW	28.284°	2026-06-18 22:44:04.277Z	2.232° 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: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2026-06-17T02:40:12.668Z)

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