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

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 3 days ago

TLE from 3 days ago

0 DELTA 1 DEB
1 21516U 75052GM  26239.85879593  .00000123  00000-0  33150-3 0  9991
2 21516  99.8238  10.4417 0070844 138.8611  13.7093 13.33017531703802

Epoch: 2026-08-27T20:36Z

TLE epoch observation values (Epoch: 2026-08-27T20:36:39.968Z)

Latitude

26.84142°

Longitude

-89.81512°

Altitude

1,086.841 km

Speed

7.336 km/s

True Right ascension

13h 01m 46s

True Declination

26° 42' 33"

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

11:37:44

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,185.943 km

Perigee altitude

1,079.523 km

Semi-major axis

7,510.87 km

Eccentricity

0.00708

Inclination

99.8238°

RAAN

10.4417°

Arg. of periapsis

138.8611°

True anomaly

13.90336°

Mean anomaly

13.7093°

Eccentric anomaly

13.80616°

Mean motion

3.33432 °/min

Orbital period

107.97 mins

BSTAR

0.0003315

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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.
9 mins	2026-08-30 20:32:06.903Z	45.575° ENE	2026-08-30 20:36:06.903Z	87.558° E	22.925°	2026-08-30 20:41:06.903Z	143.341° SSE
11 mins	2026-08-30 22:18:06.903Z	2.342° NNE	2026-08-30 22:23:06.903Z	298.608° NW	38.541°	2026-08-30 22:29:06.903Z	218.263° SW
6 mins	2026-08-31 06:55:06.903Z	79.823° E	2026-08-31 06:57:06.903Z	60.4° ENE	15.797°	2026-08-31 07:01:06.903Z	22.605° NE
11 mins	2026-08-31 08:38:06.903Z	162.362° S	2026-08-31 08:43:06.903Z	34.491° NE	44.985°	2026-08-31 08:49:06.903Z	345.492° N
5 mins	2026-08-31 10:28:06.903Z	250.112° W	2026-08-31 10:30:06.903Z	268.869° W	14.075°	2026-08-31 10:33:06.903Z	296.592° 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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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: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2026-08-27T20:36:39.968Z)

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: 3 days ago