DELTA 1 DEB, 21351

Orbit data source: Space-Track

DELTA 1 DEB, 21351 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/21351?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/21351?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21351, 1975-052BV

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, 0.3 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 DELTA 1 DEB
1 21351U 75052BV  26124.83029448  .00000003  00000-0  91911-4 0  9992
2 21351  99.8407 251.0621 0066028  62.4428  68.5527 13.31644324698430

Epoch: 2026-05-04T19:55Z

TLE epoch observation values (Epoch: 2026-05-04T19:55:37.443Z)

Latitude

47.45519°

Longitude

-79.71947°

Altitude

1,129.945 km

Speed

7.301 km/s

True Right ascension

05h 27m 36s

True Declination

47° 17' 32"

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

11:21:34

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,187.527 km

Perigee altitude

1,088.274 km

Semi-major axis

7,516.037 km

Eccentricity

0.0066

Inclination

99.8407°

RAAN

251.0621°

Arg. of periapsis

62.4428°

True anomaly

69.25905°

Mean anomaly

68.5527°

Eccentric anomaly

68.90566°

Mean motion

3.33089 °/min

Orbital period

108.08 mins

BSTAR

0.000091911

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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.
4 mins	2026-05-05 06:18:57.392Z	69.535° E	2026-05-05 06:20:57.392Z	50.923° ENE	12.185°	2026-05-05 06:22:57.392Z	32.728° NE
11 mins	2026-05-05 08:00:57.392Z	152.627° SSE	2026-05-05 08:05:57.392Z	83.87° E	43.528°	2026-05-05 08:11:57.392Z	350.108° N
7 mins	2026-05-05 09:49:57.392Z	235.038° WSW	2026-05-05 09:52:57.392Z	265.065° W	17.218°	2026-05-05 09:56:57.392Z	305.088° NW
11 mins	2026-05-05 21:07:57.392Z	21.978° NNE	2026-05-05 21:12:57.392Z	114.918° SE	43.62°	2026-05-05 21:18:57.392Z	187.609° SSW
7 mins	2026-05-05 22:55:57.392Z	331.125° NNW	2026-05-05 22:58:57.392Z	297.995° NW	19.782°	2026-05-05 23:02:57.392Z	259.318° W

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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, 21351 on other resources

View DELTA 1 DEB, 21351 on Heavens-Above

View DELTA 1 DEB, 21351 on Keep Track

View DELTA 1 DEB, 21351 on Celestrak

View DELTA 1 DEB, 21351 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, 21351

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-05-04T19:55:37.443Z)

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, 21351 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago