DELTA 1 DEB, 21377

Orbit data source: Space-Track

DELTA 1 DEB, 21377 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/21377?theme=dark&initialShowStats=false

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Identifier

21377, 1975-052CX

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, 0.2 m

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 23 hours ago

TLE from 23 hours ago

0 DELTA 1 DEB
1 21377U 75052CX  25349.99542588  .00001542  00000-0  26788-2 0  9997
2 21377 100.2980 353.3672 0223617 100.4385 324.6181 13.36179703669043

Epoch: 2025-12-15T23:53Z

TLE epoch observation values (Epoch: 2025-12-15T23:53:24.796Z)

Latitude

61.83439°

Longitude

-109.60171°

Altitude

998.521 km

Speed

7.425 km/s

True Right ascension

22h 14m 33s

True Declination

61° 41' 45"

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

21:34:51

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,288.584 km

Perigee altitude

953.202 km

Semi-major axis

7,499.03 km

Eccentricity

0.02236

Inclination

100.298°

RAAN

353.3672°

Arg. of periapsis

100.4385°

True anomaly

323.09998°

Mean anomaly

324.6181°

Eccentric anomaly

323.86253°

Mean motion

3.34222 °/min

Orbital period

107.71 mins

BSTAR

0.0026788

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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.
9 mins	2025-12-16 23:05:00.296Z	116.032° SE	2025-12-16 23:10:00.296Z	60.829° ENE	24.783°	2025-12-16 23:14:00.296Z	13.1° NNE
10 mins	2025-12-17 00:51:00.296Z	190.336° SSW	2025-12-17 00:56:00.296Z	265.124° W	36.563°	2025-12-17 01:01:00.296Z	329.97° NNW
8 mins	2025-12-17 12:09:00.296Z	54.616° ENE	2025-12-17 12:12:00.296Z	89.271° E	20.594°	2025-12-17 12:17:00.296Z	143.655° SSE
9 mins	2025-12-17 13:55:00.296Z	359.321° N	2025-12-17 13:59:00.296Z	286.959° WNW	38.956°	2025-12-17 14:04:00.296Z	218.344° SW
4 mins	2025-12-17 22:31:00.296Z	73.048° E	2025-12-17 22:33:00.296Z	52.064° ENE	13.789°	2025-12-17 22:35:00.296Z	31.734° NE

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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, 21377 on other resources

View DELTA 1 DEB, 21377 on Heavens-Above

View DELTA 1 DEB, 21377 on Keep Track

View DELTA 1 DEB, 21377 on Celestrak

View DELTA 1 DEB, 21377 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, 21377

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2025-12-15T23:53:24.796Z)

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, 21377 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 23 hours ago