**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 (62 years ago)

Launch vehicle

Unknown

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.060 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 SL-8 DEB *
1 03965U 65020EY  26300.38598870 -.00000192  00000-0 -78578-3 0  9997
2 03965  56.2987  65.0363 0271575  96.2428 302.0997 12.27716683765600

Epoch: 2026-10-27T09:15Z

TLE epoch observation values (Epoch: 2026-10-27T09:15:49.423Z)

Latitude

29.08495°

Longitude

-88.00566°

Altitude

1,450.671 km

Speed

7.189 km/s

True Right ascension

05h 46m 48s

True Declination

28° 57' 07"

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

05:08:51

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,774.45 km

Perigee altitude

1,343.35 km

Semi-major axis

7,937.037 km

Eccentricity

0.02716

Inclination

56.2987°

RAAN

65.0363°

Arg. of periapsis

96.2428°

True anomaly

299.41602°

Mean anomaly

302.0997°

Eccentric anomaly

300.76263°

Mean motion

3.06941 °/min

Orbital period

117.29 mins

BSTAR

-0.00078578

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

SL-8 DEB, 1341 (Decayed)

SL-8 DEB, 1342 (Decayed)

SL-8 DEB, 1344 (Decayed)

SL-8 DEB, 2334

SL-8 DEB, 1480

SL-8 DEB, 1478

SL-8 DEB, 5733 (Decayed)

SL-8 DEB, 1401 (Decayed)

SL-8 DEB, 1409 (Decayed)

SL-8 DEB, 1392

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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.
16 mins	2026-10-29 10:02:23.423Z	207.508° SW	2026-10-29 10:10:23.423Z	136.866° SSE	65.871°	2026-10-29 10:18:23.423Z	49.93° ENE
14 mins	2026-10-29 12:06:23.423Z	263.51° W	2026-10-29 12:13:23.423Z	328.265° NNW	42.337°	2026-10-29 12:20:23.423Z	36.959° NE
11 mins	2026-10-29 14:13:23.423Z	314.165° NW	2026-10-29 14:18:23.423Z	359.497° N	25.288°	2026-10-29 14:24:23.423Z	49.405° ENE
13 mins	2026-10-29 16:17:23.423Z	327.495° NNW	2026-10-29 16:23:23.423Z	30.19° NE	37.552°	2026-10-29 16:30:23.423Z	91.347° ESE
15 mins	2026-10-29 18:19:23.423Z	311.836° NW	2026-10-29 18:26:23.423Z	218.794° SW	76.597°	2026-10-29 18:34:23.423Z	145.361° SSE
8 mins	2026-10-29 20:24:23.423Z	270.68° WNW	2026-10-29 20:27:23.423Z	247.053° WSW	16.607°	2026-10-29 20:32:23.423Z	210.826° SW
9 mins	2026-10-30 09:29:23.423Z	197.287° SSW	2026-10-30 09:37:23.423Z	116.452° SE	52.986°	2026-10-30 09:38:23.423Z	95.949° ESE

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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: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-10-27T09:15:49.423Z)

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: 2 days ago