**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

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 6 days ago

TLE from 6 days ago

0 SL-8 DEB *
1 03965U 65020EY  26152.20682458 -.00000121  00000-0 -25915-3 0  9998
2 03965  56.2987  86.5928 0268861 271.3401 235.7911 12.27693060747405

Epoch: 2026-06-01T04:57Z

TLE epoch observation values (Epoch: 2026-06-01T04:57:49.643Z)

Latitude

28.85666°

Longitude

-79.0161°

Altitude

1,684.806 km

Speed

6.98 km/s

True Right ascension

16h 20m 33s

True Declination

28° 43' 42"

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

10:43:13

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,772.4 km

Perigee altitude

1,345.603 km

Semi-major axis

7,937.139 km

Eccentricity

0.02689

Inclination

56.2987°

RAAN

86.5928°

Arg. of periapsis

271.3401°

True anomaly

233.29127°

Mean anomaly

235.7911°

Eccentric anomaly

234.53642°

Mean motion

3.06936 °/min

Orbital period

117.29 mins

BSTAR

-0.00025915

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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, 2934

SL-8 DEB, 1477

SL-8 DEB, 1350 (Decayed)

SL-8 DEB, 1348 (Decayed)

SL-8 DEB, 1438 (Decayed)

SL-8 DEB, 1403 (Decayed)

SL-8 DEB, 1355 (Decayed)

SL-8 DEB, 3163 (Decayed)

SL-8 DEB, 4016 (Decayed)

SL-8 DEB, 1541 (Decayed)

SL-8 DEB, 1598 (Decayed)

SL-8 DEB, 1499 (Decayed)

SL-8 DEB, 1341 (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.
17 mins	2026-06-07 01:15:56.703Z	309.521° NW	2026-06-07 01:24:56.703Z	13.01° NNE	28.716°	2026-06-07 01:32:56.703Z	67.974° E
18 mins	2026-06-07 03:20:56.703Z	319.508° NNW	2026-06-07 03:29:56.703Z	40.986° NE	40.744°	2026-06-07 03:38:56.703Z	113.286° SE
17 mins	2026-06-07 05:23:56.703Z	305.238° NW	2026-06-07 05:32:56.703Z	229.667° WSW	37.518°	2026-06-07 05:40:56.703Z	167.991° S
12 mins	2026-06-07 18:33:56.703Z	150.777° SSE	2026-06-07 18:38:56.703Z	114.145° SE	21.213°	2026-06-07 18:45:56.703Z	68.149° E
19 mins	2026-06-07 20:31:56.703Z	218.703° SW	2026-06-07 20:40:56.703Z	84.881° E	44.747°	2026-06-07 20:50:56.703Z	46.099° ENE
17 mins	2026-06-07 22:36:56.703Z	273.863° WNW	2026-06-07 22:43:56.703Z	329.939° NNW	33.585°	2026-06-07 22:53:56.703Z	44.262° NE

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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: 6 days ago

TLE from 6 days ago

TLE epoch observation values (Epoch: 2026-06-01T04:57:49.643Z)

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: 6 days ago