**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: 17 hours ago

TLE from 17 hours ago

0 SL-8 DEB *
1 03965U 65020EY  26254.95618896  .00000209  00000-0  23205-2 0  9992
2 03965  56.2962 182.0297 0270229  38.8571  34.2049 12.27696714760020

Epoch: 2026-09-11T22:56Z

TLE epoch observation values (Epoch: 2026-09-11T22:56:54.726Z)

Latitude

53.54952°

Longitude

-89.20177°

Altitude

1,390.769 km

Speed

7.249 km/s

True Right ascension

16h 23m 59s

True Declination

53° 23' 54"

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

08:48:00

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,773.47 km

Perigee altitude

1,344.502 km

Semi-major axis

7,937.123 km

Eccentricity

0.02702

Inclination

56.2962°

RAAN

182.0297°

Arg. of periapsis

38.8571°

True anomaly

35.99534°

Mean anomaly

34.2049°

Eccentric anomaly

35.09507°

Mean motion

3.06936 °/min

Orbital period

117.29 mins

BSTAR

0.0023205

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

SL-8 DEB, 1438 (Decayed)

SL-8 DEB, 1398 (Decayed)

SL-8 DEB, 1564 (Decayed)

SL-8 DEB, 1538 (Decayed)

SL-8 DEB, 1400 (Decayed)

SL-8 DEB, 1595 (Decayed)

SL-8 DEB, 1551 (Decayed)

SL-8 DEB, 1542 (Decayed)

SL-8 DEB, 1635 (Decayed)

SL-8 DEB, 1402 (Decayed)

SL-8 DEB, 1370 (Decayed)

SL-8 DEB, 1596 (Decayed)

SL-8 DEB, 5733 (Decayed)

SL-8 DEB, 1489 (Decayed)

SL-8 DEB, 1340 (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.
13 mins	2026-09-12 20:09:43.796Z	175.708° S	2026-09-12 20:15:43.796Z	122.888° SE	32.114°	2026-09-12 20:22:43.796Z	61.863° ENE
15 mins	2026-09-12 22:10:43.796Z	238.131° WSW	2026-09-12 22:17:43.796Z	315.113° NNW	67.7°	2026-09-12 22:25:43.796Z	41.875° NE
12 mins	2026-09-13 00:16:43.796Z	296.632° NW	2026-09-13 00:21:43.796Z	343.964° N	29.608°	2026-09-13 00:28:43.796Z	42.022° NE
13 mins	2026-09-13 02:21:43.796Z	325.188° NNW	2026-09-13 02:26:43.796Z	9.857° NNE	29.724°	2026-09-13 02:34:43.796Z	72.619° E
17 mins	2026-09-13 04:23:43.796Z	319.709° NNW	2026-09-13 04:31:43.796Z	51.08° ENE	64.548°	2026-09-13 04:40:43.796Z	120.926° SE
15 mins	2026-09-13 06:26:43.796Z	298.708° NW	2026-09-13 06:33:43.796Z	237.722° WSW	40.068°	2026-09-13 06:41:43.796Z	175.939° 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 *, 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: 17 hours ago

TLE from 17 hours ago

TLE epoch observation values (Epoch: 2026-09-11T22:56:54.726Z)

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: 17 hours ago