**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: 2 days ago

TLE from 2 days ago

0 SL-8 DEB *
1 03965U 65020EY  25287.21741953  .00000684  00000-0  60680-2 0  9992
2 03965  56.2996 318.7371 0261223 343.7287  86.8634 12.27541372719165

Epoch: 2025-10-14T05:13Z

TLE epoch observation values (Epoch: 2025-10-14T05:13:05.047Z)

Latitude

53.07061°

Longitude

-80.53601°

Altitude

1,560.891 km

Speed

7.095 km/s

True Right ascension

01h 22m 58s

True Declination

52° 55' 19"

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

08:31:05

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,767.009 km

Perigee altitude

1,352.302 km

Semi-major axis

7,937.792 km

Eccentricity

0.02612

Inclination

56.2996°

RAAN

318.7371°

Arg. of periapsis

343.7287°

True anomaly

89.8563°

Mean anomaly

86.8634°

Eccentric anomaly

88.35948°

Mean motion

3.06898 °/min

Orbital period

117.3 mins

BSTAR

0.006068

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

SL-8 DEB, 5733 (Decayed)

SL-8 DEB, 1498 (Decayed)

SL-8 DEB, 1487 (Decayed)

SL-8 DEB, 2637 (Decayed)

SL-8 DEB, 3708 (Decayed)

SL-8 DEB, 6736 (Decayed)

SL-8 DEB, 1409 (Decayed)

SL-8 DEB, 1491 (Decayed)

SL-8 DEB, 2387 (Decayed)

SL-8 DEB, 1601 (Decayed)

SL-8 DEB, 1486 (Decayed)

SL-8 DEB, 1599 (Decayed)

SL-8 DEB, 1338 (Decayed)

SL-8 DEB, 1563 (Decayed)

SL-8 DEB, 1419 (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	2025-10-16 14:11:13.472Z	288.389° WNW	2025-10-16 14:18:13.472Z	244.14° WSW	19.152°	2025-10-16 14:24:13.472Z	207.26° SW
15 mins	2025-10-17 03:19:13.472Z	194.824° SSW	2025-10-17 03:25:13.472Z	132.85° SE	38.927°	2025-10-17 03:34:13.472Z	51.554° ENE
16 mins	2025-10-17 05:21:13.472Z	256.66° W	2025-10-17 05:28:13.472Z	326.736° NNW	37.689°	2025-10-17 05:37:13.472Z	41.971° NE
14 mins	2025-10-17 07:27:13.472Z	305.022° NW	2025-10-17 07:33:13.472Z	354.982° N	26.356°	2025-10-17 07:41:13.472Z	52.261° ENE
17 mins	2025-10-17 09:31:13.472Z	320.826° NNW	2025-10-17 09:39:13.472Z	28.878° NE	32.292°	2025-10-17 09:48:13.472Z	90.431° ESE
19 mins	2025-10-17 11:34:13.472Z	314.689° NW	2025-10-17 11:42:13.472Z	309.789° NW	44.815°	2025-10-17 11:53:13.472Z	138.406° SSE
12 mins	2025-10-17 13:38:13.472Z	288.883° WNW	2025-10-17 13:44:13.472Z	247.248° WSW	23.866°	2025-10-17 13:50:13.472Z	203.88° SW

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: 2025-10-14T05:13:05.047Z)

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