DELTA 1 DEB, 21287

Orbit data source: Space-Track

DELTA 1 DEB, 21287 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/21287?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21287, 1975-052Y

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, 0.5 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 10 hours ago

TLE from 10 hours ago

0 DELTA 1 DEB
1 21287U 75052Y   26002.34094862 -.00000003  00000-0  91712-4 0  9993
2 21287  99.7027 160.4339 0130242 285.5916 133.0195 13.17946518667691

Epoch: 2026-01-02T08:10Z

TLE epoch observation values (Epoch: 2026-01-02T08:10:57.960Z)

Latitude

58.40926°

Longitude

-80.34958°

Altitude

1,270.297 km

Speed

7.193 km/s

True Right ascension

09h 37m 29s

True Declination

58° 15' 57"

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

17:40:24

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,288.485 km

Perigee altitude

1,091.35 km

Semi-major axis

7,568.055 km

Eccentricity

0.01302

Inclination

99.7027°

RAAN

160.4339°

Arg. of periapsis

285.5916°

True anomaly

134.09862°

Mean anomaly

133.0195°

Eccentric anomaly

133.56026°

Mean motion

3.2966 °/min

Orbital period

109.2 mins

BSTAR

0.000091712

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

DELTA 1 DEB, 42660 (Decayed)

DELTA 1 DEB, 21348 (Decayed)

DELTA 1 DEB, 21390 (Decayed)

DELTA 1 DEB, 21687 (Decayed)

DELTA 1 DEB, 21675 (Decayed)

DELTA 1 DEB, 21517 (Decayed)

DELTA 1 DEB, 21510 (Decayed)

DELTA 1 DEB, 21449 (Decayed)

DELTA 1 DEB, 37629 (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	2026-01-02 23:04:21.467Z	20.685° NNE	2026-01-02 23:10:21.467Z	93.357° ESE	43.502°	2026-01-02 23:17:21.467Z	186.837° SSW
9 mins	2026-01-03 00:53:21.467Z	341.113° N	2026-01-03 00:57:21.467Z	302.189° NW	22.458°	2026-01-03 01:02:21.467Z	255.757° W
12 mins	2026-01-03 09:31:21.467Z	130.582° SE	2026-01-03 09:36:21.467Z	67.543° E	36.076°	2026-01-03 09:43:21.467Z	356.757° N
11 mins	2026-01-03 11:19:21.467Z	209.767° SW	2026-01-03 11:24:21.467Z	267.857° W	29.243°	2026-01-03 11:30:21.467Z	325.745° 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, 21287 on other resources

View DELTA 1 DEB, 21287 on Heavens-Above

View DELTA 1 DEB, 21287 on Keep Track

View DELTA 1 DEB, 21287 on Celestrak

View DELTA 1 DEB, 21287 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, 21287

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-01-02T08:10:57.960Z)

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, 21287 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 10 hours ago