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)

Expand to show TLE details & history
Last TLE update: 23 hours ago

TLE from 23 hours ago

0 DELTA 1 DEB
1 21500U 75052FV  26081.95414736  .00002557  00000-0  71034-3 0  9990
2 21500 100.0435 257.5949 0158160 324.3025 189.6086 14.40545930800588

Epoch: 2026-03-22T22:53Z

TLE epoch observation values (Epoch: 2026-03-22T22:53:58.331Z)

Latitude

25.98502°

Longitude

-81.42507°

Altitude

871.155 km

Speed

7.361 km/s

True Right ascension

05h 30m 05s

True Declination

25° 51' 07"

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

03:05:54

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

866.695 km

Perigee altitude

641.094 km

Semi-major axis

7,132.032 km

Eccentricity

0.01582

Inclination

100.0435°

RAAN

257.5949°

Arg. of periapsis

324.3025°

True anomaly

189.31187°

Mean anomaly

189.6086°

Eccentric anomaly

189.45966°

Mean motion

3.60349 °/min

Orbital period

99.9 mins

BSTAR

0.00071034

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

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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.
8 mins	2026-03-23 23:46:46.064Z	42.141° NE	2026-03-23 23:50:46.064Z	97.83° ESE	27.214°	2026-03-23 23:54:46.064Z	153.556° SSE
8 mins	2026-03-24 01:25:46.064Z	350.093° N	2026-03-24 01:29:46.064Z	283.004° WNW	30.719°	2026-03-24 01:33:46.064Z	231.388° WSW
7 mins	2026-03-24 10:59:46.064Z	130.925° SE	2026-03-24 11:02:46.064Z	74.82° E	34.001°	2026-03-24 11:06:46.064Z	2.463° NNE
5 mins	2026-03-24 12:39:46.064Z	233.53° WSW	2026-03-24 12:41:46.064Z	264.674° W	19.114°	2026-03-24 12:44:46.064Z	306.667° 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: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2026-03-22T22:53:58.331Z)

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: 23 hours ago