DELTA 1 DEB, 21493

Orbit data source: Space-Track

DELTA 1 DEB, 21493 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/21493?theme=dark&initialShowStats=false

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Identifier

21493, 1975-052FN

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)

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Last TLE update: 2 days ago

TLE from 2 days ago

0 DELTA 1 DEB
1 21493U 75052FN  25333.37238775 -.00007595  00000-0 -29596-1 0  9996
2 21493  99.6930 112.2781 0740956  74.0309 318.1732 12.21839950528003

Epoch: 2025-11-29T08:56Z

TLE epoch observation values (Epoch: 2025-11-29T08:56:14.301Z)

Latitude

25.76744°

Longitude

-94.9882°

Altitude

1,168.825 km

Speed

7.46 km/s

True Right ascension

07h 10m 17s

True Declination

25° 38' 25"

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

13:45:18

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,171.802 km

Perigee altitude

992.181 km

Semi-major axis

7,960.129 km

Eccentricity

0.0741

Inclination

99.693°

RAAN

112.2781°

Arg. of periapsis

74.0309°

True anomaly

312.10395°

Mean anomaly

318.1732°

Eccentric anomaly

315.18076°

Mean motion

3.05607 °/min

Orbital period

117.8 mins

BSTAR

-0.029596

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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.
7 mins	2025-12-01 20:24:43.458Z	69.14° E	2025-12-01 20:27:43.458Z	94.009° ESE	14.038°	2025-12-01 20:31:43.458Z	122.868° SE
14 mins	2025-12-01 22:18:43.458Z	15.89° NNE	2025-12-01 22:23:43.458Z	38.421° NE	44.834°	2025-12-01 22:32:43.458Z	196.031° SSW
7 mins	2025-12-02 00:16:43.458Z	327.197° NNW	2025-12-02 00:19:43.458Z	298.689° NW	16.588°	2025-12-02 00:23:43.458Z	266.732° W
6 mins	2025-12-02 07:44:43.458Z	85.045° E	2025-12-02 07:46:43.458Z	62.329° ENE	17.618°	2025-12-02 07:50:43.458Z	19.575° NNE
10 mins	2025-12-02 09:37:43.458Z	180.544° SSW	2025-12-02 09:42:43.458Z	263.521° W	41.467°	2025-12-02 09:47:43.458Z	336.146° 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, 21493 on other resources

View DELTA 1 DEB, 21493 on Heavens-Above

View DELTA 1 DEB, 21493 on Keep Track

View DELTA 1 DEB, 21493 on Celestrak

View DELTA 1 DEB, 21493 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, 21493

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2025-11-29T08:56:14.301Z)

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, 21493 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago