DELTA 1 DEB, 21384

Orbit data source: Space-Track

DELTA 1 DEB, 21384 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/21384?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21384, 1975-052DE

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)

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Last TLE update: 19 hours ago

TLE from 19 hours ago

0 DELTA 1 DEB
1 21384U 75052DE  25350.54750323  .00000084  00000-0  37757-3 0  9995
2 21384  99.6453 215.1188 0293833 237.4134 249.0197 12.91259703627358

Epoch: 2025-12-16T13:08Z

TLE epoch observation values (Epoch: 2025-12-16T13:08:24.279Z)

Latitude

55.54923°

Longitude

126.85871°

Altitude

1,392.082 km

Speed

7.128 km/s

True Right ascension

03h 17m 33s

True Declination

55° 24' 06"

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

06:26:30

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,519.332 km

Perigee altitude

1,068.473 km

Semi-major axis

7,672.04 km

Eccentricity

0.02938

Inclination

99.6453°

RAAN

215.1188°

Arg. of periapsis

237.4134°

True anomaly

245.91819°

Mean anomaly

249.0197°

Eccentric anomaly

247.46471°

Mean motion

3.22981 °/min

Orbital period

111.46 mins

BSTAR

0.00037757

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

DELTA 1 DEB, 21440 (Decayed)

DELTA 1 DEB, 37627 (Decayed)

DELTA 1 DEB, 37629 (Decayed)

DELTA 1 DEB, 37628 (Decayed)

DELTA 1 DEB, 21521 (Decayed)

DELTA 1 DEB, 21564 (Decayed)

DELTA 1 DEB, 37630 (Decayed)

DELTA 1 DEB, 21322 (Decayed)

DELTA 1 DEB, 42630

DELTA 1 DEB, 21447 (Decayed)

DELTA 1 DEB, 42646

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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	2025-12-17 12:51:12.363Z	83.822° E	2025-12-17 12:56:12.363Z	47.53° ENE	15.836°	2025-12-17 13:00:12.363Z	19.022° NNE
15 mins	2025-12-17 14:37:12.363Z	148.927° SSE	2025-12-17 14:44:12.363Z	61.003° ENE	43.029°	2025-12-17 14:52:12.363Z	350.514° N
12 mins	2025-12-17 16:29:12.363Z	223.249° SW	2025-12-17 16:34:12.363Z	267.315° W	24.586°	2025-12-17 16:41:12.363Z	322.169° NNW
7 mins	2025-12-18 02:22:12.363Z	58.462° ENE	2025-12-18 02:25:12.363Z	84.065° E	16.664°	2025-12-18 02:29:12.363Z	119.705° SE
13 mins	2025-12-18 04:10:12.363Z	12.931° NNE	2025-12-18 04:16:12.363Z	320.044° NNW	44.791°	2025-12-18 04:23:12.363Z	200.017° SSW
8 mins	2025-12-18 06:01:12.363Z	338.196° N	2025-12-18 06:05:12.363Z	304.651° NW	17.26°	2025-12-18 06:09:12.363Z	271.269° WNW

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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, 21384 on other resources

View DELTA 1 DEB, 21384 on Heavens-Above

View DELTA 1 DEB, 21384 on Keep Track

View DELTA 1 DEB, 21384 on Celestrak

View DELTA 1 DEB, 21384 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, 21384

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 19 hours ago

TLE from 19 hours ago

TLE epoch observation values (Epoch: 2025-12-16T13:08:24.279Z)

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, 21384 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 19 hours ago