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 URL

https://www.satcat.com/sats-embedded/21516?theme=dark&initialShowStats=false

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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)

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Last TLE update: 2 days ago

TLE from 2 days ago

0 DELTA 1 DEB
1 21516U 75052GM  26180.86491012  .00000144  00000-0  37788-3 0  9997
2 21516  99.8163 314.0033 0068818 280.3456 232.2531 13.32997864695949

Epoch: 2026-06-29T20:45Z

TLE epoch observation values (Epoch: 2026-06-29T20:45:28.234Z)

Latitude

27.61604°

Longitude

-90.14171°

Altitude

1,170.609 km

Speed

7.255 km/s

True Right ascension

09h 16m 40s

True Declination

27° 28' 58"

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

10:18:30

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,184.496 km

Perigee altitude

1,081.118 km

Semi-major axis

7,510.944 km

Eccentricity

0.00688

Inclination

99.8163°

RAAN

314.0033°

Arg. of periapsis

280.3456°

True anomaly

231.63282°

Mean anomaly

232.2531°

Eccentric anomaly

231.94263°

Mean motion

3.33427 °/min

Orbital period

107.97 mins

BSTAR

0.00037788

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

DELTA 1 DEB, 21280

DELTA 1 DEB, 21345

DELTA 1 DEB, 21597 (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.
11 mins	2026-07-01 23:01:00.298Z	353.34° N	2026-07-01 23:06:00.298Z	304.39° NW	27.339°	2026-07-01 23:12:00.298Z	240.793° WSW
9 mins	2026-07-02 07:36:00.298Z	107.739° ESE	2026-07-02 07:40:00.298Z	60.389° ENE	26.591°	2026-07-02 07:45:00.298Z	8.827° NNE
11 mins	2026-07-02 09:21:00.298Z	189.758° SSW	2026-07-02 09:26:00.298Z	260.793° W	38.337°	2026-07-02 09:32:00.298Z	333.108° NNW
10 mins	2026-07-02 20:41:00.298Z	44.604° NE	2026-07-02 20:46:00.298Z	99.419° ESE	25.182°	2026-07-02 20:51:00.298Z	149.038° SSE
12 mins	2026-07-02 22:27:00.298Z	1.588° NNE	2026-07-02 22:32:00.298Z	301.749° NW	38.475°	2026-07-02 22:39:00.298Z	217.759° SW

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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: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-29T20:45:28.234Z)

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: 2 days ago