**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: 23 hours ago

TLE from 23 hours ago

0 SL-8 DEB *
1 03931U 65020EV  26031.49586814 -.00000060  00000-0  22635-3 0  9994
2 03931  56.0601 221.1258 0189007 265.2472 116.9892 12.35211635760277

Epoch: 2026-01-31T11:54Z

TLE epoch observation values (Epoch: 2026-01-31T11:54:03.007Z)

Latitude

19.86898°

Longitude

-74.09935°

Altitude

1,597.64 km

Speed

7.042 km/s

True Right ascension

15h 40m 31s

True Declination

19° 46' 15"

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

12:12:49

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,676.2 km

Perigee altitude

1,377.383 km

Semi-major axis

7,904.928 km

Eccentricity

0.0189

Inclination

56.0601°

RAAN

221.1258°

Arg. of periapsis

265.2472°

True anomaly

118.89835°

Mean anomaly

116.9892°

Eccentric anomaly

117.94585°

Mean motion

3.08813 °/min

Orbital period

116.58 mins

BSTAR

0.00022635

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

SL-8 DEB, 1552 (Decayed)

SL-8 DEB, 1336 (Decayed)

SL-8 DEB, 1569 (Decayed)

SL-8 DEB, 1355 (Decayed)

SL-8 DEB, 1564 (Decayed)

SL-8 DEB, 1353 (Decayed)

SL-8 DEB, 1538 (Decayed)

SL-8 DEB, 1539 (Decayed)

SL-8 DEB, 1554 (Decayed)

SL-8 DEB, 1557 (Decayed)

SL-8 DEB, 1372 (Decayed)

SL-8 DEB, 1488 (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.
15 mins	2026-02-01 13:06:43.327Z	169.904° S	2026-02-01 13:13:43.327Z	118.489° SE	26.382°	2026-02-01 13:21:43.327Z	62.438° ENE
18 mins	2026-02-01 15:06:43.327Z	228.633° WSW	2026-02-01 15:14:43.327Z	288.371° WNW	44.649°	2026-02-01 15:24:43.327Z	44.86° NE
16 mins	2026-02-01 17:10:43.327Z	279.53° WNW	2026-02-01 17:18:43.327Z	343.731° N	31.273°	2026-02-01 17:26:43.327Z	43.416° NE
15 mins	2026-02-01 19:16:43.327Z	316.109° NNW	2026-02-01 19:23:43.327Z	11.713° NNE	28.183°	2026-02-01 19:31:43.327Z	68.639° E
17 mins	2026-02-01 21:19:43.327Z	320.295° NNW	2026-02-01 21:27:43.327Z	36.631° NE	40.574°	2026-02-01 21:36:43.327Z	113.355° SE
16 mins	2026-02-01 23:21:43.327Z	303.806° NW	2026-02-01 23:29:43.327Z	234.855° WSW	37.083°	2026-02-01 23:37:43.327Z	167.802° 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: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2026-01-31T11:54:03.007Z)

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: 23 hours ago