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

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 21 hours ago

TLE from 21 hours ago

0 DELTA 1 DEB
1 21549U 75052HD  25349.96587561  .00000201  00000-0  63465-3 0  9990
2 21549  99.7719 347.5013 0201531 309.9414 117.7129 13.09332351649243

Epoch: 2025-12-15T23:10Z

TLE epoch observation values (Epoch: 2025-12-15T23:10:51.652Z)

Latitude

67.61633°

Longitude

-109.65951°

Altitude

1,311.016 km

Speed

7.172 km/s

True Right ascension

21h 31m 39s

True Declination

67° 30' 13"

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

18:53:41

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,376.289 km

Perigee altitude

1,069.912 km

Semi-major axis

7,601.238 km

Eccentricity

0.02015

Inclination

99.7719°

RAAN

347.5013°

Arg. of periapsis

309.9414°

True anomaly

119.73326°

Mean anomaly

117.7129°

Eccentric anomaly

118.72548°

Mean motion

3.27504 °/min

Orbital period

109.92 mins

BSTAR

0.00063465

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

DELTA 1 DEB, 35533 (Decayed)

DELTA 1 DEB, 21431 (Decayed)

DELTA 1 DEB, 7965 (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.
12 mins	2025-12-16 22:48:17.490Z	120.91° SE	2025-12-16 22:53:17.490Z	69.989° E	29.746°	2025-12-16 23:00:17.490Z	1.451° NNE
12 mins	2025-12-17 00:36:17.490Z	193.874° SSW	2025-12-17 00:42:17.490Z	272.018° WNW	35.505°	2025-12-17 00:48:17.490Z	331.482° NNW
13 mins	2025-12-17 12:08:17.490Z	32.871° NE	2025-12-17 12:14:17.490Z	99.081° ESE	35.348°	2025-12-17 12:21:17.490Z	167.808° S
13 mins	2025-12-17 13:56:17.490Z	356.972° N	2025-12-17 14:02:17.490Z	297.132° NW	33.089°	2025-12-17 14:09:17.490Z	231.18° WSW

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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: 21 hours ago

TLE from 21 hours ago

TLE epoch observation values (Epoch: 2025-12-15T23:10:51.652Z)

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: 21 hours ago