**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

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 1 day ago

TLE from 1 day ago

0 SL-8 DEB *
1 03931U 65020EV  26193.31012392 -.00000091  00000-0  82633-5 0  9999
2 03931  56.0599 156.1691 0192530 117.3257  28.4926 12.35215334780260

Epoch: 2026-07-12T07:26Z

TLE epoch observation values (Epoch: 2026-07-12T07:26:34.706Z)

Latitude

27.01121°

Longitude

-85.64648°

Altitude

1,395.352 km

Speed

7.225 km/s

True Right ascension

21h 04m 50s

True Declination

26° 53' 01"

Sunlit

Object was in full shadow 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

21:36:37

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,678.969 km

Perigee altitude

1,374.582 km

Semi-major axis

7,904.912 km

Eccentricity

0.01925

Inclination

56.0599°

RAAN

156.1691°

Arg. of periapsis

117.3257°

True anomaly

29.56773°

Mean anomaly

28.4926°

Eccentric anomaly

29.02787°

Mean motion

3.08814 °/min

Orbital period

116.57 mins

BSTAR

0.0000082633

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

SL-8 DEB, 1557 (Decayed)

SL-8 DEB, 1558 (Decayed)

SL-8 DEB, 1549

SL-8 DEB, 1335

SL-8 DEB *, 6252

SL-8 DEB, 3163 (Decayed)

SL-8 DEB, 4016 (Decayed)

COSMOS 63, 1269 (Decayed)

SL-8 DEB, 1541 (Decayed)

SL-8 DEB, 1341 (Decayed)

SL-8 DEB, 1537 (Decayed)

SL-8 DEB, 1556 (Decayed)

SL-8 DEB, 1345 (Decayed)

SL-8 DEB, 1343 (Decayed)

SL-8 DEB, 1598 (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.
11 mins	2026-07-13 21:37:01.605Z	153.931° SSE	2026-07-13 21:42:01.605Z	119.349° SE	18.472°	2026-07-13 21:48:01.605Z	75.298° E
15 mins	2026-07-13 23:36:01.605Z	216.292° SW	2026-07-13 23:43:01.605Z	155.667° SSE	44.52°	2026-07-13 23:51:01.605Z	47.49° ENE
14 mins	2026-07-14 01:39:01.605Z	272.168° WNW	2026-07-14 01:46:01.605Z	336.688° NNW	31.948°	2026-07-14 01:53:01.605Z	38.921° NE
11 mins	2026-07-14 03:45:01.605Z	316.997° NNW	2026-07-14 03:50:01.605Z	1.164° NNE	24.173°	2026-07-14 03:56:01.605Z	52.883° ENE
14 mins	2026-07-14 05:48:01.605Z	325.326° NNW	2026-07-14 05:54:01.605Z	27.612° NE	34.911°	2026-07-14 06:02:01.605Z	100.912° ESE
14 mins	2026-07-14 07:50:01.605Z	306.125° NW	2026-07-14 07:56:01.605Z	239.105° WSW	41.439°	2026-07-14 08:04:01.605Z	154.587° SSE

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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: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-07-12T07:26:34.706Z)

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: 1 day ago