**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: 2 days ago

TLE from 2 days ago

0 SL-8 DEB *
1 03965U 65020EY  26207.30942291 -.00000093  00000-0 -36245-4 0  9991
2 03965  56.3001 304.7191 0265259 339.5489  51.2408 12.27676760754173

Epoch: 2026-07-26T07:25Z

TLE epoch observation values (Epoch: 2026-07-26T07:25:34.139Z)

Latitude

27.17373°

Longitude

-90.76476°

Altitude

1,432.474 km

Speed

7.206 km/s

True Right ascension

21h 38m 32s

True Declination

27° 02' 47"

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

16:35:50

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,769.613 km

Perigee altitude

1,348.53 km

Semi-major axis

7,937.209 km

Eccentricity

0.02653

Inclination

56.3001°

RAAN

304.7191°

Arg. of periapsis

339.5489°

True anomaly

53.66055°

Mean anomaly

51.2408°

Eccentric anomaly

52.44568°

Mean motion

3.06932 °/min

Orbital period

117.29 mins

BSTAR

-0.000036245

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

SL-8 DEB, 1349 (Decayed)

SL-8 DEB, 1541 (Decayed)

SL-8 DEB *, 6252

SL-8 DEB, 1478

SL-8 DEB, 1351 (Decayed)

SL-8 DEB, 1499 (Decayed)

SL-8 DEB, 5733 (Decayed)

SL-8 DEB, 1538 (Decayed)

SL-8 DEB, 1534 (Decayed)

SL-8 DEB, 2637 (Decayed)

SL-8 DEB, 1416 (Decayed)

SL-8 DEB, 1339 (Decayed)

SL-8 DEB, 1348 (Decayed)

COSMOS 61, 1267 (Decayed)

SL-8 DEB, 2204 (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.
7 mins	2026-07-28 06:17:04.690Z	135.769° SSE	2026-07-28 06:21:04.690Z	106.473° ESE	13.693°	2026-07-28 06:24:04.690Z	85.435° E
16 mins	2026-07-28 08:14:04.690Z	208.896° SW	2026-07-28 08:21:04.690Z	145.401° SSE	43.035°	2026-07-28 08:30:04.690Z	48.668° ENE
15 mins	2026-07-28 10:18:04.690Z	268.326° W	2026-07-28 10:25:04.690Z	339.284° N	34.445°	2026-07-28 10:33:04.690Z	41.117° NE
14 mins	2026-07-28 12:24:04.690Z	312.121° NW	2026-07-28 12:30:04.690Z	2.008° NNE	26.367°	2026-07-28 12:38:04.690Z	57.727° ENE
17 mins	2026-07-28 14:28:04.690Z	323.482° NNW	2026-07-28 14:35:04.690Z	24.307° NE	35.289°	2026-07-28 14:45:04.690Z	99.118° ESE
19 mins	2026-07-28 16:30:04.690Z	311.604° NW	2026-07-28 16:39:04.690Z	220.353° SW	43.887°	2026-07-28 16:49:04.690Z	148.105° SSE
11 mins	2026-07-28 18:35:04.690Z	281.449° WNW	2026-07-28 18:40:04.690Z	249.389° W	18.333°	2026-07-28 18:46:04.690Z	211.664° SW

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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: 2026-07-26T07:25:34.139Z)

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