**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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/3931?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/3931?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

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: 20 hours ago

TLE from 20 hours ago

0 SL-8 DEB *
1  3931U 65020EV  26130.65113478 -.00000117  00000-0 -18301-3 0  9993
2  3931  56.0633 320.7292 0192624  35.9467  37.2838 12.35216680772522

Epoch: 2026-05-10T15:37Z

TLE epoch observation values (Epoch: 2026-05-10T15:37:38.044Z)

Latitude

53.24542°

Longitude

-78.4274°

Altitude

1,413.872 km

Speed

7.213 km/s

True Right ascension

01h 37m 43s

True Declination

53° 05' 39"

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

19:42:04

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,679.037 km

Perigee altitude

1,374.502 km

Semi-major axis

7,904.906 km

Eccentricity

0.01926

Inclination

56.0633°

RAAN

320.7292°

Arg. of periapsis

35.9467°

True anomaly

38.64687°

Mean anomaly

37.2838°

Eccentric anomaly

37.96271°

Mean motion

3.08815 °/min

Orbital period

116.57 mins

BSTAR

-0.00018301

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

SL-8 DEB, 1418 (Decayed)

SL-8 DEB, 1480

SL-8 DEB, 1498 (Decayed)

SL-8 DEB, 1335

SL-8 DEB, 1337 (Decayed)

SL-8 DEB, 1341 (Decayed)

SL-8 DEB, 1417 (Decayed)

SL-8 DEB, 1539 (Decayed)

SL-8 DEB, 1542 (Decayed)

SL-8 DEB, 2934

SL-8 DEB, 6736 (Decayed)

SL-8 DEB, 3038

SL-8 DEB, 2637 (Decayed)

SL-8 DEB, 1479

SL-8 DEB, 1549

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

SL-8 DEB * Visibility forecast

Loading observer location...
Set Observer location

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.
7 mins	2026-05-11 12:43:29.271Z	141.155° SSE	2026-05-11 12:47:29.271Z	111.446° ESE	14.158°	2026-05-11 12:50:29.271Z	88.776° E
15 mins	2026-05-11 14:40:29.271Z	211.01° SW	2026-05-11 14:47:29.271Z	140.821° SSE	43.437°	2026-05-11 14:55:29.271Z	49.054° ENE
14 mins	2026-05-11 16:43:29.271Z	268.864° W	2026-05-11 16:50:29.271Z	340.344° N	32.976°	2026-05-11 16:57:29.271Z	39.689° NE
13 mins	2026-05-11 18:48:29.271Z	311.411° NW	2026-05-11 18:54:29.271Z	3.481° NNE	24.6°	2026-05-11 19:01:29.271Z	56.516° ENE
15 mins	2026-05-11 20:51:29.271Z	322.595° NNW	2026-05-11 20:58:29.271Z	28.471° NE	34.307°	2026-05-11 21:06:29.271Z	96.434° ESE
16 mins	2026-05-11 22:53:29.271Z	310.019° NW	2026-05-11 23:00:29.271Z	249.652° W	43.293°	2026-05-11 23:09:29.271Z	149.313° SSE
9 mins	2026-05-12 00:57:29.271Z	275.201° WNW	2026-05-12 01:01:29.271Z	247.254° WSW	16.055°	2026-05-12 01:06:29.271Z	214.045° SW

Items per page:

1–7 of 7 items

of 1 page

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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: 20 hours ago

TLE from 20 hours ago

TLE epoch observation values (Epoch: 2026-05-10T15:37:38.044Z)

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: 20 hours ago