DELTA 1 DEB, 21549

Orbit data source: Space-Track

DELTA 1 DEB, 21549 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/21549?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/21549?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21549, 1975-052HD

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, 1.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

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

TLE from 2 days ago

0 DELTA 1 DEB
1 21549U 75052HD  26171.41945940  .00000215  00000-0  67302-3 0  9992
2 21549  99.7824 158.0446 0199233 239.4851 278.9680 13.09483282673645

Epoch: 2026-06-20T10:04Z

TLE epoch observation values (Epoch: 2026-06-20T10:04:01.292Z)

Latitude

23.46424°

Longitude

-77.32488°

Altitude

1,207.178 km

Speed

7.262 km/s

True Right ascension

22h 49m 15s

True Declination

23° 20' 47"

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

17:35:32

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,373.947 km

Perigee altitude

1,071.087 km

Semi-major axis

7,600.654 km

Eccentricity

0.01992

Inclination

99.7824°

RAAN

158.0446°

Arg. of periapsis

239.4851°

True anomaly

276.70467°

Mean anomaly

278.968°

Eccentric anomaly

277.83714°

Mean motion

3.27542 °/min

Orbital period

109.91 mins

BSTAR

0.00067302

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

DELTA 1 DEB, 21374

DELTA 1 DEB, 21464

DELTA 1 DEB, 27577

DELTA 1 DEB, 21456 (Decayed)

DELTA 1 DEB, 21518 (Decayed)

DELTA 1 DEB, 21385 (Decayed)

DELTA 1 DEB, 37628 (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	2026-06-22 11:23:10.212Z	26.622° NE	2026-06-22 11:30:10.212Z	104.318° ESE	36.897°	2026-06-22 11:36:10.212Z	170.841° S
10 mins	2026-06-22 13:13:10.212Z	349.847° N	2026-06-22 13:18:10.212Z	294.694° NW	28.894°	2026-06-22 13:23:10.212Z	242.277° WSW
12 mins	2026-06-22 21:54:10.212Z	121.435° SE	2026-06-22 22:00:10.212Z	60.105° ENE	31.359°	2026-06-22 22:06:10.212Z	3.617° NNE
13 mins	2026-06-22 23:42:10.212Z	193.169° SSW	2026-06-22 23:48:10.212Z	265.077° W	37.077°	2026-06-22 23:55:10.212Z	333.047° 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, 21549 on other resources

View DELTA 1 DEB, 21549 on Heavens-Above

View DELTA 1 DEB, 21549 on Keep Track

View DELTA 1 DEB, 21549 on Celestrak

View DELTA 1 DEB, 21549 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, 21549

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: 2026-06-20T10:04:01.292Z)

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, 21549 on other resources

Documentation

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