DELTA 1 DEB, 21387

Orbit data source: Space-Track

DELTA 1 DEB, 21387 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/21387?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21387, 1975-052DH

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: 1 day ago

TLE from 1 day ago

0 DELTA 1 DEB
1 21387U 75052DH  26181.77329424  .00000154  00000-0  32408-3 0  9996
2 21387  99.4901 111.6547 0044827 227.9371 159.6379 13.46378206721534

Epoch: 2026-06-30T18:33Z

TLE epoch observation values (Epoch: 2026-06-30T18:33:32.622Z)

Latitude

27.38°

Longitude

-90.51205°

Altitude

1,120.246 km

Speed

7.279 km/s

True Right ascension

07h 06m 51s

True Declination

27° 14' 48"

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

13:31:18

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,116.355 km

Perigee altitude

1,049.464 km

Semi-major axis

7,461.046 km

Eccentricity

0.00448

Inclination

99.4901°

RAAN

111.6547°

Arg. of periapsis

227.9371°

True anomaly

159.8157°

Mean anomaly

159.6379°

Eccentric anomaly

159.72689°

Mean motion

3.36778 °/min

Orbital period

106.9 mins

BSTAR

0.00032408

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

DELTA 1 DEB, 21597 (Decayed)

DELTA 1 DEB, 42655

DELTA 1 DEB, 21343 (Decayed)

DELTA 1 DEB, 21562 (Decayed)

DELTA 1 DEB, 21297

DELTA 1 DEB, 21545

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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.
7 mins	2026-07-02 06:44:16.541Z	55.565° ENE	2026-07-02 06:48:16.541Z	94.859° ESE	16.033°	2026-07-02 06:51:16.541Z	123.954° SE
11 mins	2026-07-02 08:29:16.541Z	9.615° NNE	2026-07-02 08:34:16.541Z	257.376° W	43.988°	2026-07-02 08:40:16.541Z	202.942° SW
11 mins	2026-07-02 18:42:16.541Z	139.498° SSE	2026-07-02 18:47:16.541Z	66.993° ENE	39.038°	2026-07-02 18:53:16.541Z	355.806° N
9 mins	2026-07-02 20:29:16.541Z	223.691° SW	2026-07-02 20:33:16.541Z	270.997° WNW	23.777°	2026-07-02 20:38:16.541Z	319.982° 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, 21387 on other resources

View DELTA 1 DEB, 21387 on Heavens-Above

View DELTA 1 DEB, 21387 on Keep Track

View DELTA 1 DEB, 21387 on Celestrak

View DELTA 1 DEB, 21387 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, 21387

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-06-30T18:33:32.622Z)

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, 21387 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago