**SL-8 DEB *, 3965**

Orbit data source: Space-Track

SL-8 DEB *, 3965 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/3965?theme=dark&initialShowStats=false

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Identifier

3965, 1965-020EY

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: 10 hours ago

TLE from 10 hours ago

0 SL-8 DEB *
1  3965U 65020EY  25336.81949565  .00000197  00000-0  22323-2 0  9993
2  3965  56.2980 191.0485 0270649  46.5128  50.5170 12.27598179725257

Epoch: 2025-12-02T19:40Z

TLE epoch observation values (Epoch: 2025-12-02T19:40:04.424Z)

Latitude

55.27386°

Longitude

-69.11009°

Altitude

1,434.041 km

Speed

7.21 km/s

True Right ascension

19h 51m 13s

True Declination

55° 07' 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

03:36:55

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,774.24 km

Perigee altitude

1,344.582 km

Semi-major axis

7,937.548 km

Eccentricity

0.02706

Inclination

56.298°

RAAN

191.0485°

Arg. of periapsis

46.5128°

True anomaly

52.96254°

Mean anomaly

50.517°

Eccentric anomaly

51.73454°

Mean motion

3.06912 °/min

Orbital period

117.3 mins

BSTAR

0.0022323

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

SL-8 DEB, 5983 (Decayed)

SL-8 DEB, 1544 (Decayed)

SL-8 DEB, 1342 (Decayed)

SL-8 DEB, 1480

SL-8 DEB *, 3931

SL-8 DEB *, 3745

SL-8 DEB, 2339 (Decayed)

SL-8 DEB, 2334

SL-8 DEB *, 6252

SL-8 DEB, 1565 (Decayed)

SL-8 DEB, 1492 (Decayed)

SL-8 DEB *, 3743

SL-8 DEB, 1410 (Decayed)

SL-8 DEB, 1495 (Decayed)

SL-8 DEB, 1402 (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.
10 mins	2025-12-03 14:48:07.898Z	155.086° SSE	2025-12-03 14:53:07.898Z	116.207° SE	18.228°	2025-12-03 14:58:07.898Z	76.25° E
14 mins	2025-12-03 16:48:07.898Z	220.12° SW	2025-12-03 16:54:07.898Z	196.992° SSW	44.639°	2025-12-03 17:02:07.898Z	45.932° ENE
13 mins	2025-12-03 18:52:07.898Z	279.504° WNW	2025-12-03 18:58:07.898Z	339.604° N	29.83°	2025-12-03 19:05:07.898Z	39.585° NE
12 mins	2025-12-03 20:58:07.898Z	321.125° NNW	2025-12-03 21:03:07.898Z	6.824° NNE	24.187°	2025-12-03 21:10:07.898Z	60.685° ENE
15 mins	2025-12-03 23:01:07.898Z	324.392° NNW	2025-12-03 23:08:07.898Z	40.019° NE	36.708°	2025-12-03 23:16:07.898Z	104.85° ESE
16 mins	2025-12-04 01:03:07.898Z	306.889° NW	2025-12-04 01:10:07.898Z	244.685° WSW	40.382°	2025-12-04 01:19:07.898Z	158.523° S
4 mins	2025-12-04 03:10:07.898Z	259.412° W	2025-12-04 03:12:07.898Z	246.445° WSW	11.474°	2025-12-04 03:14:07.898Z	233.913° WSW

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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 *, 3965 on other resources

View SL-8 DEB *, 3965 on Heavens-Above

View SL-8 DEB *, 3965 on Keep Track

View SL-8 DEB *, 3965 on Celestrak

View SL-8 DEB *, 3965 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 *, 3965

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2025-12-02T19:40:04.424Z)

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 *, 3965 on other resources

Documentation

**SL-8 DEB *, 3965**

Expand to show TLE details & history
Last TLE update: 10 hours ago