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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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)

Expand to show TLE details & history
Last TLE update: 15 hours ago

TLE from 15 hours ago

0 DELTA 1 DEB
1 21281U 75052S   26126.81718796  .00000066  00000-0  21778-3 0  9997
2 21281  99.9999  59.4161 0057665  35.3751  26.6136 13.34324564704212

Epoch: 2026-05-06T19:36Z

TLE epoch observation values (Epoch: 2026-05-06T19:36:45.039Z)

Latitude

60.76596°

Longitude

-117.71056°

Altitude

1,102.094 km

Speed

7.326 km/s

True Right ascension

02h 44m 35s

True Declination

60° 37' 33"

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

18:17:03

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,171.117 km

Perigee altitude

1,084.55 km

Semi-major axis

7,505.97 km

Eccentricity

0.00577

Inclination

99.9999°

RAAN

59.4161°

Arg. of periapsis

35.3751°

True anomaly

26.91153°

Mean anomaly

26.6136°

Eccentric anomaly

26.76237°

Mean motion

3.33759 °/min

Orbital period

107.86 mins

BSTAR

0.00021778

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

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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	2026-05-07 10:17:25.766Z	336.884° NNW	2026-05-07 10:20:25.766Z	309.418° NW	15.707°	2026-05-07 10:24:25.766Z	271.903° WNW
11 mins	2026-05-07 18:49:25.766Z	140.564° SSE	2026-05-07 18:54:25.766Z	72.831° E	39.171°	2026-05-07 19:00:25.766Z	355.092° N
8 mins	2026-05-07 20:37:25.766Z	222.819° SW	2026-05-07 20:41:25.766Z	269.032° W	22.642°	2026-05-07 20:45:25.766Z	312.143° NW
12 mins	2026-05-08 07:54:25.766Z	29.218° NE	2026-05-08 07:59:25.766Z	93.107° ESE	38.477°	2026-05-08 08:06:25.766Z	177.051° S
9 mins	2026-05-08 09:41:25.766Z	345.899° N	2026-05-08 09:45:25.766Z	301.187° NW	25.805°	2026-05-08 09:50:25.766Z	246.731° 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, 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: 15 hours ago

TLE from 15 hours ago

TLE epoch observation values (Epoch: 2026-05-06T19:36:45.039Z)

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: 15 hours ago