DELTA 1 DEB, 21516

Orbit data source: Space-Track

DELTA 1 DEB, 21516 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/21516?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/21516?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21516, 1975-052GM

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: 20 hours ago

TLE from 20 hours ago

0 DELTA 1 DEB
1 21516U 75052GM  26100.85392676  .00000161  00000-0  40910-3 0  9994
2 21516  99.8038 237.5242 0071068 113.0168  39.5043 13.32970625685282

Epoch: 2026-04-10T20:29Z

TLE epoch observation values (Epoch: 2026-04-10T20:29:39.272Z)

Latitude

26.56868°

Longitude

-84.03927°

Altitude

1,097.626 km

Speed

7.326 km/s

True Right ascension

04h 09m 49s

True Declination

26° 26' 15"

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

22:50:33

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,186.288 km

Perigee altitude

1,079.529 km

Semi-major axis

7,511.046 km

Eccentricity

0.00711

Inclination

99.8038°

RAAN

237.5242°

Arg. of periapsis

113.0168°

True anomaly

40.02592°

Mean anomaly

39.5043°

Eccentric anomaly

39.76475°

Mean motion

3.33421 °/min

Orbital period

107.97 mins

BSTAR

0.0004091

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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.
12 mins	2026-04-11 21:33:24.563Z	25.173° NE	2026-04-11 21:39:24.563Z	111.434° ESE	39.799°	2026-04-11 21:45:24.563Z	179.063° S
8 mins	2026-04-11 23:21:24.563Z	341.677° N	2026-04-11 23:25:24.563Z	295.336° NW	23.176°	2026-04-11 23:29:24.563Z	252.432° W
10 mins	2026-04-12 07:54:24.563Z	119.72° SE	2026-04-12 07:59:24.563Z	60.64° ENE	28.877°	2026-04-12 08:04:24.563Z	6.117° NNE
11 mins	2026-04-12 09:40:24.563Z	195.801° SSW	2026-04-12 09:45:24.563Z	259.251° W	34.418°	2026-04-12 09:51:24.563Z	330.044° NNW

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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, 21516 on other resources

View DELTA 1 DEB, 21516 on Heavens-Above

View DELTA 1 DEB, 21516 on Keep Track

View DELTA 1 DEB, 21516 on Celestrak

View DELTA 1 DEB, 21516 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, 21516

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 20 hours ago

TLE from 20 hours ago

TLE epoch observation values (Epoch: 2026-04-10T20:29:39.272Z)

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, 21516 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 20 hours ago