**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  26223.98464861 -.00000088  00000-0  28839-4 0  9991
2 03931  56.0615  75.6107 0191916 157.1906 351.6569 12.35217161784051

Epoch: 2026-08-11T23:37Z

TLE epoch observation values (Epoch: 2026-08-11T23:37:53.639Z)

Latitude

25.7335°

Longitude

-78.13646°

Altitude

1,378.201 km

Speed

7.241 km/s

True Right ascension

15h 47m 07s

True Declination

25° 36' 36"

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

15:51:18

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,678.475 km

Perigee altitude

1,375.06 km

Semi-major axis

7,904.904 km

Eccentricity

0.01919

Inclination

56.0615°

RAAN

75.6107°

Arg. of periapsis

157.1906°

True anomaly

351.33005°

Mean anomaly

351.6569°

Eccentric anomaly

351.49426°

Mean motion

3.08815 °/min

Orbital period

116.57 mins

BSTAR

0.000028839

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

SL-8 DEB, 1488 (Decayed)

SL-8 DEB *, 3743

SL-8 DEB, 1477

SL-8 DEB, 1634

SL-8 DEB, 1635 (Decayed)

SL-8 DEB, 1478

SL-8 DEB, 1344 (Decayed)

SL-8 DEB, 3708 (Decayed)

SL-8 DEB, 1555 (Decayed)

SL-8 DEB, 1549

SL-8 DEB, 1538 (Decayed)

SL-8 DEB, 1592 (Decayed)

SL-8 DEB, 3038

SL-8 DEB, 1480

SL-8 DEB, 1561 (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.
6 mins	2026-08-13 13:49:45.441Z	126.307° SE	2026-08-13 13:51:45.441Z	113.278° SE	13.263°	2026-08-13 13:55:45.441Z	87.457° E
16 mins	2026-08-13 15:44:45.441Z	202.851° SW	2026-08-13 15:52:45.441Z	120.452° SE	41.593°	2026-08-13 16:00:45.441Z	51.354° ENE
16 mins	2026-08-13 17:46:45.441Z	258.399° W	2026-08-13 17:54:45.441Z	328.198° NNW	36.672°	2026-08-13 18:02:45.441Z	40.106° NE
13 mins	2026-08-13 19:52:45.441Z	305.203° NW	2026-08-13 19:58:45.441Z	353.572° N	25.314°	2026-08-13 20:05:45.441Z	50.37° ENE
14 mins	2026-08-13 21:56:45.441Z	323.081° NNW	2026-08-13 22:03:45.441Z	29.589° NE	31.459°	2026-08-13 22:10:45.441Z	88.982° E
15 mins	2026-08-13 23:58:45.441Z	312.776° NW	2026-08-14 00:05:45.441Z	254.997° W	44.647°	2026-08-14 00:13:45.441Z	141.934° 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: 2026-08-11T23:37:53.639Z)

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