**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: 3 days ago

TLE from 3 days ago

0 SL-8 DEB *
1  3965U 65020EY  26061.88341953  .00000494  00000-0  45545-2 0  9994
2  3965  56.2996 319.1653 0266255 157.1463 281.5700 12.27636954736311

Epoch: 2026-03-02T21:12Z

TLE epoch observation values (Epoch: 2026-03-02T21:12:07.447Z)

Latitude

53.85466°

Longitude

-94.222°

Altitude

1,529.652 km

Speed

7.123 km/s

True Right ascension

01h 37m 55s

True Declination

53° 42' 24"

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

11:35:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,770.58 km

Perigee altitude

1,347.907 km

Semi-major axis

7,937.38 km

Eccentricity

0.02663

Inclination

56.2996°

RAAN

319.1653°

Arg. of periapsis

157.1463°

True anomaly

278.56224°

Mean anomaly

281.57°

Eccentric anomaly

280.06796°

Mean motion

3.06922 °/min

Orbital period

117.29 mins

BSTAR

0.0045545

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

SL-8 DEB, 1540 (Decayed)

SL-8 DEB, 3708 (Decayed)

SL-8 DEB, 1346 (Decayed)

SL-8 DEB, 2334

SL-8 DEB *, 6252

SL-8 DEB, 4016 (Decayed)

SL-8 DEB, 1537 (Decayed)

SL-8 DEB, 1343 (Decayed)

SL-8 DEB, 1479

SL-8 DEB, 1541 (Decayed)

SL-8 DEB, 1554 (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.
14 mins	2026-03-06 16:43:11.872Z	164.921° S	2026-03-06 16:50:11.872Z	120.431° SE	22.999°	2026-03-06 16:57:11.872Z	70.024° E
17 mins	2026-03-06 18:44:11.872Z	221.604° SW	2026-03-06 18:52:11.872Z	208.414° SW	44.919°	2026-03-06 19:01:11.872Z	45.461° ENE
15 mins	2026-03-06 20:49:11.872Z	276.762° WNW	2026-03-06 20:56:11.872Z	336.094° NNW	31.506°	2026-03-06 21:04:11.872Z	41.425° NE
13 mins	2026-03-06 22:55:11.872Z	313.824° NW	2026-03-06 23:01:11.872Z	1.083° NNE	25.062°	2026-03-06 23:08:11.872Z	58.932° ENE
15 mins	2026-03-07 00:59:11.872Z	322.324° NNW	2026-03-07 01:06:11.872Z	30.108° NE	36.868°	2026-03-07 01:14:11.872Z	105.768° ESE
14 mins	2026-03-07 03:02:11.872Z	304.975° NW	2026-03-07 03:09:11.872Z	227.491° WSW	38.788°	2026-03-07 03:16:11.872Z	161.678° 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: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2026-03-02T21:12:07.447Z)

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: 3 days ago