DELTA 1 DEB, 21281

Orbit data source: Space-Track

DELTA 1 DEB, 21281 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/21281?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21281, 1975-052S

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, 0.7 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

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Last TLE update: 1 day ago

TLE from 1 day ago

0 DELTA 1 DEB
1 21281U 75052S   26190.27094656  .00000008  00000-0  10428-3 0  9996
2 21281 100.0000 121.3802 0056014 243.0396 272.9034 13.34334215712676

Epoch: 2026-07-09T06:30Z

TLE epoch observation values (Epoch: 2026-07-09T06:30:09.782Z)

Latitude

24.32421°

Longitude

-78.82763°

Altitude

1,131.365 km

Speed

7.29 km/s

True Right ascension

20h 23m 42s

True Declination

24° 12' 07"

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

22:53:29

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,169.841 km

Perigee altitude

1,085.753 km

Semi-major axis

7,505.934 km

Eccentricity

0.0056

Inclination

100°

RAAN

121.3802°

Arg. of periapsis

243.0396°

True anomaly

272.26214°

Mean anomaly

272.9034°

Eccentric anomaly

272.58279°

Mean motion

3.33761 °/min

Orbital period

107.86 mins

BSTAR

0.00010428

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

DELTA 1 DEB, 21432 (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	2026-07-10 17:52:28.785Z	104.069° ESE	2026-07-10 17:57:28.785Z	52.938° ENE	21.979°	2026-07-10 18:01:28.785Z	14.443° NNE
12 mins	2026-07-10 19:37:28.785Z	177.615° S	2026-07-10 19:42:28.785Z	247.266° WSW	42.645°	2026-07-10 19:49:28.785Z	339.345° N
7 mins	2026-07-11 06:58:28.785Z	60.85° ENE	2026-07-11 07:01:28.785Z	92.337° ESE	18.955°	2026-07-11 07:05:28.785Z	131.96° SE
12 mins	2026-07-11 08:42:28.785Z	8.994° NNE	2026-07-11 08:48:28.785Z	278.755° WNW	43.04°	2026-07-11 08:54:28.785Z	208.269° SW

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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, 21281 on other resources

View DELTA 1 DEB, 21281 on Heavens-Above

View DELTA 1 DEB, 21281 on Keep Track

View DELTA 1 DEB, 21281 on Celestrak

View DELTA 1 DEB, 21281 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, 21281

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-07-09T06:30:09.782Z)

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, 21281 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago