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 (50 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: 6 hours ago

TLE from 6 hours ago

0 DELTA 1 DEB
1 21500U 75052FV  25337.37033154  .00007888  00000-0  21903-2 0  9991
2 21500 100.0328 129.2244 0161851 277.0239 144.3487 14.39384201784814

Epoch: 2025-12-03T08:53Z

TLE epoch observation values (Epoch: 2025-12-03T08:53:16.645Z)

Latitude

60.89788°

Longitude

-94.96797°

Altitude

865.379 km

Speed

7.376 km/s

True Right ascension

07h 23m 10s

True Declination

60° 45' 13"

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

13:10:40

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

873.229 km

Perigee altitude

642.239 km

Semi-major axis

7,135.871 km

Eccentricity

0.01619

Inclination

100.0328°

RAAN

129.2244°

Arg. of periapsis

277.0239°

True anomaly

145.41214°

Mean anomaly

144.3487°

Eccentric anomaly

144.88216°

Mean motion

3.60058 °/min

Orbital period

99.98 mins

BSTAR

0.0021903

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

DELTA 1 DEB, 21474 (Decayed)

DELTA 1 DEB, 21436 (Decayed)

DELTA 1 DEB, 21684 (Decayed)

DELTA 1 DEB, 21597 (Decayed)

DELTA 1 DEB, 21569 (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.
9 mins	2025-12-03 22:32:19.288Z	37.038° NE	2025-12-03 22:36:19.288Z	91.521° ESE	29.82°	2025-12-03 22:41:19.288Z	163.202° S
7 mins	2025-12-04 00:12:19.288Z	341.236° N	2025-12-04 00:15:19.288Z	291.868° WNW	27.467°	2025-12-04 00:19:19.288Z	237.881° WSW
9 mins	2025-12-04 09:45:19.288Z	139.999° SSE	2025-12-04 09:49:19.288Z	55.725° ENE	38.584°	2025-12-04 09:54:19.288Z	354.153° N
5 mins	2025-12-04 11:26:19.288Z	242.552° WSW	2025-12-04 11:28:19.288Z	271.078° WNW	18.283°	2025-12-04 11:31:19.288Z	307.165° NW

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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: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2025-12-03T08:53:16.645Z)

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: 6 hours ago