**SL-8 DEB *, 3931**

Orbit data source: Space-Track

SL-8 DEB *, 3931 is space debris in LEO originally from a launch on Mon, 15 Mar 1965 UTC launched from the Tyuratam Missile And Space Complex (TTMTR). 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/3931?theme=dark&initialShowStats=false

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Identifier

3931, 1965-020EV

Orbit

LEO

Country

CIS

Related business

Russian Strategic Rocket Forces (RU)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1965-03-15 (61 years ago)

Launch vehicle

Unknown

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.1 m

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 SL-8 DEB *
1  3931U 65020EV  26082.32358441 -.00000095  00000-0 -28286-4 0  9993
2  3931  56.0612  87.6455 0190640 332.4185  55.4651 12.35214637766558

Epoch: 2026-03-23T07:45Z

TLE epoch observation values (Epoch: 2026-03-23T07:45:57.693Z)

Latitude

24.33045°

Longitude

167.96258°

Altitude

1,444.621 km

Speed

7.18 km/s

True Right ascension

07h 01m 04s

True Declination

24° 12' 47"

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

00:38:37

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,677.478 km

Perigee altitude

1,376.079 km

Semi-major axis

7,904.915 km

Eccentricity

0.01906

Inclination

56.0612°

RAAN

87.6455°

Arg. of periapsis

332.4185°

True anomaly

57.28903°

Mean anomaly

55.4651°

Eccentric anomaly

56.37462°

Mean motion

3.08814 °/min

Orbital period

116.57 mins

BSTAR

-0.000028286

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Other satellites on launch #20 in the year 1965 (1965-03-15 UTC)

SL-8 DEB, 1593 (Decayed)

SL-8 DEB, 1478

SL-8 DEB, 1477

SL-8 DEB, 1595 (Decayed)

COSMOS 63, 1269 (Decayed)

SL-8 DEB, 1342 (Decayed)

SL-8 DEB, 3749

SL-8 DEB *, 3965

SL-8 DEB, 5983 (Decayed)

SL-8 DEB, 1539 (Decayed)

SL-8 DEB, 1351 (Decayed)

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SL-8 DEB * 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	2026-03-24 01:10:53.698Z	177.069° S	2026-03-24 01:17:53.698Z	121.021° SE	28.208°	2026-03-24 01:24:53.698Z	63.447° ENE
16 mins	2026-03-24 03:11:53.698Z	235.774° WSW	2026-03-24 03:18:53.698Z	300.436° NW	43.544°	2026-03-24 03:27:53.698Z	43.262° NE
15 mins	2026-03-24 05:15:53.698Z	286.855° WNW	2026-03-24 05:22:53.698Z	345.952° N	28.988°	2026-03-24 05:30:53.698Z	45.562° ENE
15 mins	2026-03-24 07:20:53.698Z	318.172° NNW	2026-03-24 07:27:53.698Z	15.982° NNE	28.325°	2026-03-24 07:35:53.698Z	73.017° E
18 mins	2026-03-24 09:22:53.698Z	318.209° NNW	2026-03-24 09:31:53.698Z	50.126° ENE	42.071°	2026-03-24 09:40:53.698Z	119.12° SE
16 mins	2026-03-24 11:25:53.698Z	299.927° NW	2026-03-24 11:32:53.698Z	243.384° WSW	34.372°	2026-03-24 11:41:53.698Z	172.661° S

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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 DEB *, 3931 on other resources

View SL-8 DEB *, 3931 on Heavens-Above

View SL-8 DEB *, 3931 on Keep Track

View SL-8 DEB *, 3931 on Celestrak

View SL-8 DEB *, 3931 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 DEB *, 3931

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-03-23T07:45:57.693Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #20 in the year 1965 (1965-03-15 UTC)

SL-8 DEB * Visibility forecast

Co-orbital & Co-planar RSOs

Check out SL-8 DEB *, 3931 on other resources

Documentation

**SL-8 DEB *, 3931**

Expand to show TLE details & history
Last TLE update: 12 hours ago