DELTA 1 DEB, 21356

Orbit data source: Space-Track

DELTA 1 DEB, 21356 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/21356?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21356, 1975-052CA

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: 14 hours ago

TLE from 14 hours ago

0 DELTA 1 DEB
1 21356U 75052CA  25350.28800171  .00000112  00000-0  31814-3 0  9992
2 21356  99.7242 273.6258 0093150   1.1017 152.9806 13.30740260677875

Epoch: 2025-12-16T06:54Z

TLE epoch observation values (Epoch: 2025-12-16T06:54:43.347Z)

Latitude

25.07525°

Longitude

-90.65328°

Altitude

1,209.438 km

Speed

7.221 km/s

True Right ascension

06h 32m 48s

True Declination

24° 57' 05"

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

19:42:36

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,211.344 km

Perigee altitude

1,071.257 km

Semi-major axis

7,519.437 km

Eccentricity

0.00932

Inclination

99.7242°

RAAN

273.6258°

Arg. of periapsis

1.1017°

True anomaly

153.46053°

Mean anomaly

152.9806°

Eccentric anomaly

153.22106°

Mean motion

3.32863 °/min

Orbital period

108.15 mins

BSTAR

0.00031814

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

DELTA 1 DEB, 21431 (Decayed)

DELTA 1 DEB, 7965 (Decayed)

DELTA 1 DEB, 35533 (Decayed)

DELTA 1 DEB, 21495 (Decayed)

DELTA 1 DEB, 21539 (Decayed)

DELTA 1 DEB, 37627 (Decayed)

DELTA 1 DEB, 21521 (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.
7 mins	2025-12-17 06:15:04.157Z	60.067° ENE	2025-12-17 06:18:04.157Z	86.079° E	14.292°	2025-12-17 06:22:04.157Z	120.644° SE
12 mins	2025-12-17 08:00:04.157Z	15.345° NNE	2025-12-17 08:06:04.157Z	180.807° SSW	44.874°	2025-12-17 08:12:04.157Z	196.034° SSW
6 mins	2025-12-17 09:49:04.157Z	327.825° NNW	2025-12-17 09:51:04.157Z	308.336° NW	17.297°	2025-12-17 09:55:04.157Z	270.608° WNW
11 mins	2025-12-17 18:21:04.157Z	138.743° SSE	2025-12-17 18:26:04.157Z	75.747° E	37.883°	2025-12-17 18:32:04.157Z	356.96° N
9 mins	2025-12-17 20:09:04.157Z	218.302° SW	2025-12-17 20:13:04.157Z	263.456° W	23.926°	2025-12-17 20:18:04.157Z	317.372° 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, 21356 on other resources

View DELTA 1 DEB, 21356 on Heavens-Above

View DELTA 1 DEB, 21356 on Keep Track

View DELTA 1 DEB, 21356 on Celestrak

View DELTA 1 DEB, 21356 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, 21356

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 14 hours ago

TLE from 14 hours ago

TLE epoch observation values (Epoch: 2025-12-16T06:54:43.347Z)

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, 21356 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 14 hours ago