SL-3 DEB, 21126

Orbit data source: Space-Track

SL-3 DEB, 21126 is space debris in LEO originally from a launch on Fri, 28 Aug 1964 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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Iframe URL

https://www.satcat.com/sats-embedded/21126?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21126, 1964-053C

Orbit

LEO

Country

CIS

Related business

Russian Strategic Rocket Forces (RU)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1964-08-28 (62 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: 14 hours ago

TLE from 14 hours ago

0 SL-3 DEB
1 21126U 64053C   26121.81758729  .00000695  00000-0  13362-3 0  9997
2 21126  65.0770 288.5618 0071329 250.3447 224.7260 14.69672677259132

Epoch: 2026-05-01T19:37Z

TLE epoch observation values (Epoch: 2026-05-01T19:37:19.541Z)

Latitude

55.7352°

Longitude

-88.23467°

Altitude

706.26 km

Speed

7.489 km/s

True Right ascension

04h 23m 21s

True Declination

55° 34' 26"

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

17:39:16

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

710.863 km

Perigee altitude

610.449 km

Semi-major axis

7,038.793 km

Eccentricity

0.00713

Inclination

65.077°

RAAN

288.5618°

Arg. of periapsis

250.3447°

True anomaly

224.15443°

Mean anomaly

224.726°

Eccentric anomaly

224.43985°

Mean motion

3.67533 °/min

Orbital period

97.95 mins

BSTAR

0.00013362

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Other satellites on launch #53 in the year 1964 (1964-08-28 UTC)

SL-3 R/B, 877

COSMOS 44, 876

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SL-3 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.
5 mins	2026-05-02 11:33:24.383Z	145.362° SSE	2026-05-02 11:36:24.383Z	106.559° ESE	16.066°	2026-05-02 11:38:24.383Z	79.364° E
8 mins	2026-05-02 13:13:24.383Z	229.888° WSW	2026-05-02 13:16:24.383Z	290.433° WNW	40.469°	2026-05-02 13:21:24.383Z	24.153° NE
8 mins	2026-05-02 21:47:24.383Z	326.593° NNW	2026-05-02 21:50:24.383Z	309.663° NW	43.677°	2026-05-02 21:55:24.383Z	152.619° SSE

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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-3 DEB, 21126 on other resources

View SL-3 DEB, 21126 on Heavens-Above

View SL-3 DEB, 21126 on Keep Track

View SL-3 DEB, 21126 on Celestrak

View SL-3 DEB, 21126 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-3 DEB, 21126

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 14 hours ago

TLE from 14 hours ago

TLE epoch observation values (Epoch: 2026-05-01T19:37:19.541Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #53 in the year 1964 (1964-08-28 UTC)

SL-3 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out SL-3 DEB, 21126 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 14 hours ago