DELTA 1 DEB, 21373

Orbit data source: Space-Track

DELTA 1 DEB, 21373 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/21373?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/21373?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21373, 1975-052CT

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: 11 hours ago

TLE from 11 hours ago

0 DELTA 1 DEB
1 21373U 75052CT  26101.21220002  .00000067  00000-0  22300-3 0  9997
2 21373  99.9447 358.1480 0074334 185.4102 326.8786 13.32677046695392

Epoch: 2026-04-11T05:05Z

TLE epoch observation values (Epoch: 2026-04-11T05:05:34.081Z)

Latitude

27.76154°

Longitude

-92.41056°

Altitude

1,093.284 km

Speed

7.331 km/s

True Right ascension

12h 13m 39s

True Declination

27° 37' 35"

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

22:48:24

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,189.86 km

Perigee altitude

1,078.179 km

Semi-major axis

7,512.157 km

Eccentricity

0.00743

Inclination

99.9447°

RAAN

358.148°

Arg. of periapsis

185.4102°

True anomaly

326.40952°

Mean anomaly

326.8786°

Eccentric anomaly

326.64442°

Mean motion

3.33347 °/min

Orbital period

108 mins

BSTAR

0.000223

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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.
13 mins	2026-04-11 17:02:16.252Z	167.394° S	2026-04-11 17:09:16.252Z	302.347° NW	44.302°	2026-04-11 17:15:16.252Z	342.674° N
5 mins	2026-04-12 04:26:16.252Z	72.112° E	2026-04-12 04:28:16.252Z	92.302° ESE	14.846°	2026-04-12 04:31:16.252Z	120.797° SE
11 mins	2026-04-12 06:10:16.252Z	12.392° NNE	2026-04-12 06:15:16.252Z	284.108° WNW	44.717°	2026-04-12 06:21:16.252Z	201.12° SSW
4 mins	2026-04-12 07:59:16.252Z	319.515° NNW	2026-04-12 08:00:16.252Z	309.697° NW	14.199°	2026-04-12 08:03:16.252Z	280.907° 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, 21373 on other resources

View DELTA 1 DEB, 21373 on Heavens-Above

View DELTA 1 DEB, 21373 on Keep Track

View DELTA 1 DEB, 21373 on Celestrak

View DELTA 1 DEB, 21373 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, 21373

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2026-04-11T05:05:34.081Z)

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, 21373 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 11 hours ago