DELTA 1 DEB, 21500

Orbit data source: Space-Track

DELTA 1 DEB, 21500 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/21500?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/21500?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21500, 1975-052FV

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)

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Last TLE update: 1 day ago

TLE from 1 day ago

0 DELTA 1 DEB
1 21500U 75052FV  26135.01222470  .00002541  00000-0  70021-3 0  9997
2 21500 100.0449 319.8492 0158323 172.4094 339.3780 14.40884700808222

Epoch: 2026-05-15T00:17Z

TLE epoch observation values (Epoch: 2026-05-15T00:17:36.214Z)

Latitude

28.42825°

Longitude

-91.82878°

Altitude

653.555 km

Speed

7.589 km/s

True Right ascension

09h 41m 17s

True Declination

28° 16' 57"

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

16:00:10

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

865.675 km

Perigee altitude

639.877 km

Semi-major axis

7,130.913 km

Eccentricity

0.01583

Inclination

100.0449°

RAAN

319.8492°

Arg. of periapsis

172.4094°

True anomaly

338.72698°

Mean anomaly

339.378°

Eccentric anomaly

339.05371°

Mean motion

3.60434 °/min

Orbital period

99.88 mins

BSTAR

0.00070021

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

DELTA 1 DEB, 21378 (Decayed)

DELTA 1 DEB, 21456 (Decayed)

DELTA 1 DEB, 21506

DELTA 1 DEB, 21675 (Decayed)

DELTA 1 DEB, 21440 (Decayed)

DELTA 1 DEB, 26845

DELTA 1 DEB, 21563 (Decayed)

DELTA 1 DEB, 42656

DELTA 1 DEB, 21438

DELTA 1 DEB, 21391 (Decayed)

DELTA 1 DEB, 21516

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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.
5 mins	2026-05-16 10:46:32.491Z	87.782° E	2026-05-16 10:48:32.491Z	63.676° ENE	15.188°	2026-05-16 10:51:32.491Z	27.256° NE
9 mins	2026-05-16 12:22:32.491Z	172.346° S	2026-05-16 12:26:32.491Z	227.853° WSW	43.327°	2026-05-16 12:31:32.491Z	339.741° N
5 mins	2026-05-17 00:32:32.491Z	56.772° ENE	2026-05-17 00:34:32.491Z	94.102° ESE	23.593°	2026-05-17 00:37:32.491Z	147.336° SSE
6 mins	2026-05-17 02:10:32.491Z	343.225° N	2026-05-17 02:13:32.491Z	288.333° WNW	24.725°	2026-05-17 02:16:32.491Z	240.168° WSW

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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, 21500 on other resources

View DELTA 1 DEB, 21500 on Heavens-Above

View DELTA 1 DEB, 21500 on Keep Track

View DELTA 1 DEB, 21500 on Celestrak

View DELTA 1 DEB, 21500 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, 21500

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-05-15T00:17:36.214Z)

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, 21500 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago