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 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: 6 hours ago

TLE from 6 hours ago

0 DELTA 1 DEB
1 21351U 75052BV  25345.19673809  .00000044  00000-0  17800-3 0  9990
2 21351  99.8225 112.8644 0065805  48.4949  71.4477 13.31626245679181

Epoch: 2025-12-11T04:43Z

TLE epoch observation values (Epoch: 2025-12-11T04:43:18.170Z)

Latitude

58.04762°

Longitude

157.91422°

Altitude

1,134.868 km

Speed

7.298 km/s

True Right ascension

20h 35m 35s

True Declination

57° 54' 03"

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

08:47:55

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,187.427 km

Perigee altitude

1,088.508 km

Semi-major axis

7,516.105 km

Eccentricity

0.00658

Inclination

99.8225°

RAAN

112.8644°

Arg. of periapsis

48.4949°

True anomaly

72.16444°

Mean anomaly

71.4477°

Eccentric anomaly

71.80588°

Mean motion

3.33084 °/min

Orbital period

108.08 mins

BSTAR

0.000178

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

DELTA 1 DEB, 21508 (Decayed)

DELTA 1 DEB, 21518 (Decayed)

DELTA 1 DEB, 21385 (Decayed)

DELTA 1 DEB, 42660 (Decayed)

DELTA 1 DEB, 21335 (Decayed)

DELTA 1 DEB, 21344 (Decayed)

DELTA 1 DEB, 21681 (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.
12 mins	2025-12-11 20:56:50.097Z	27.691° NE	2025-12-11 21:02:50.097Z	91.154° ESE	35.752°	2025-12-11 21:08:50.097Z	168.754° S
10 mins	2025-12-11 22:44:50.097Z	350.016° N	2025-12-11 22:49:50.097Z	290.843° WNW	28.082°	2025-12-11 22:54:50.097Z	239.498° WSW
9 mins	2025-12-12 07:19:50.097Z	108.658° ESE	2025-12-12 07:23:50.097Z	63.519° ENE	24.517°	2025-12-12 07:28:50.097Z	10.053° NNE
11 mins	2025-12-12 09:04:50.097Z	186.343° SSW	2025-12-12 09:09:50.097Z	249.378° W	38.446°	2025-12-12 09:15:50.097Z	333.28° 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, 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: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2025-12-11T04:43:18.170Z)

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: 6 hours ago