DELTA 1 DEB, 21331

Orbit data source: Space-Track

DELTA 1 DEB, 21331 is space debris in SSO originally from a launch on Thu, 12 Jun 1975 UTC launched from the Air Force Western Test Range (AFWTR). 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 src="https://www.satcat.com/sats-embedded/21331?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/21331?theme=dark&initialShowStats=false

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Identifier

21331, 1975-052AZ

Orbit

SSO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1975-06-12 (51 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

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: 8 hours ago

TLE from 8 hours ago

0 DELTA 1 DEB
1 21331U 75052AZ  26079.06209421  .00000020  00000-0  11511-3 0  9991
2 21331  99.6656 288.8627 0025672 316.5573 198.0139 13.39755184704947

Epoch: 2026-03-20T01:29Z

TLE epoch observation values (Epoch: 2026-03-20T01:29:24.939Z)

Latitude

25.16111°

Longitude

-86.52848°

Altitude

1,131.404 km

Speed

7.28 km/s

True Right ascension

07h 33m 42s

True Declination

25° 02' 08"

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

14:26:36

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,126.722 km

Perigee altitude

1,088.287 km

Semi-major axis

7,485.642 km

Eccentricity

0.00257

Inclination

99.6656°

RAAN

288.8627°

Arg. of periapsis

316.5573°

True anomaly

197.9232°

Mean anomaly

198.0139°

Eccentric anomaly

197.96852°

Mean motion

3.35119 °/min

Orbital period

107.42 mins

BSTAR

0.00011511

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Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)

DELTA 1 DEB, 21390 (Decayed)

DELTA 1 DEB, 21601

DELTA 1 DEB, 21687 (Decayed)

DELTA 1 DEB, 21337 (Decayed)

DELTA 1 DEB, 21357 (Decayed)

DELTA 1 DEB, 21676 (Decayed)

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DELTA 1 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.
11 mins	2026-03-20 13:23:20.026Z	145.568° SSE	2026-03-20 13:28:20.026Z	76.036° E	41.283°	2026-03-20 13:34:20.026Z	353.613° N
8 mins	2026-03-20 15:11:20.026Z	229.036° WSW	2026-03-20 15:14:20.026Z	261.083° W	20.706°	2026-03-20 15:19:20.026Z	312.929° NW
12 mins	2026-03-21 02:25:20.026Z	25.783° NE	2026-03-21 02:30:20.026Z	85.32° E	40.109°	2026-03-21 02:37:20.026Z	179.933° S
9 mins	2026-03-21 04:12:20.026Z	342.239° N	2026-03-21 04:16:20.026Z	297.465° NW	23.795°	2026-03-21 04:21:20.026Z	247.579° W

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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 DELTA 1 DEB, 21331 on other resources

View DELTA 1 DEB, 21331 on Heavens-Above

View DELTA 1 DEB, 21331 on Keep Track

View DELTA 1 DEB, 21331 on Celestrak

View DELTA 1 DEB, 21331 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

DELTA 1 DEB, 21331

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-03-20T01:29:24.939Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)

DELTA 1 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 1 DEB, 21331 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago