DELTA 1 DEB, 21441

Orbit data source: Space-Track

DELTA 1 DEB, 21441 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/21441?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/21441?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21441, 1975-052DZ

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 (50 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: 13 hours ago

TLE from 13 hours ago

0 DELTA 1 DEB
1 21441U 75052DZ  25335.14306412  .00000082  00000-0  40522-3 0  9996
2 21441  99.6896 115.1770 0303282 224.8268 317.2515 12.84225683620152

Epoch: 2025-12-01T03:26Z

TLE epoch observation values (Epoch: 2025-12-01T03:26:00.739Z)

Latitude

0.23422°

Longitude

173.46691°

Altitude

1,158.996 km

Speed

7.353 km/s

True Right ascension

19h 40m 52s

True Declination

0° 13' 58"

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

13:45:49

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,555.441 km

Perigee altitude

1,088.384 km

Semi-major axis

7,700.05 km

Eccentricity

0.03033

Inclination

99.6896°

RAAN

115.177°

Arg. of periapsis

224.8268°

True anomaly

314.82575°

Mean anomaly

317.2515°

Eccentric anomaly

316.0454°

Mean motion

3.2122 °/min

Orbital period

112.07 mins

BSTAR

0.00040522

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

DELTA 1 DEB, 21456 (Decayed)

DELTA 1 DEB, 21474 (Decayed)

DELTA 1 DEB, 21494 (Decayed)

DELTA 1 DEB, 21348 (Decayed)

DELTA 1 DEB, 21671 (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.
13 mins	2025-12-01 21:49:14.138Z	25.463° NE	2025-12-01 21:56:14.138Z	103.677° ESE	38.643°	2025-12-01 22:02:14.138Z	172.985° S
11 mins	2025-12-01 23:41:14.138Z	348.66° N	2025-12-01 23:46:14.138Z	297.114° NW	27.827°	2025-12-01 23:52:14.138Z	241.148° WSW
15 mins	2025-12-02 08:31:14.138Z	132.357° SE	2025-12-02 08:38:14.138Z	59.394° ENE	37.224°	2025-12-02 08:46:14.138Z	355.417° N
15 mins	2025-12-02 10:21:14.138Z	199.79° SSW	2025-12-02 10:28:14.138Z	263.232° W	33.228°	2025-12-02 10:36:14.138Z	330.628° 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, 21441 on other resources

View DELTA 1 DEB, 21441 on Heavens-Above

View DELTA 1 DEB, 21441 on Keep Track

View DELTA 1 DEB, 21441 on Celestrak

View DELTA 1 DEB, 21441 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, 21441

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2025-12-01T03:26:00.739Z)

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, 21441 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 13 hours ago