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 src="https://www.satcat.com/sats-embedded/21287?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/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: 5 hours ago

TLE from 5 hours ago

0 DELTA 1 DEB
1 21287U 75052Y   26079.19132272 -.00000010  00000-0  70214-4 0  9990
2 21287  99.7159 231.2704 0131627 105.2238  78.7180 13.17951764677816

Epoch: 2026-03-20T04:35Z

TLE epoch observation values (Epoch: 2026-03-20T04:35:30.283Z)

Latitude

-5.48899°

Longitude

163.72633°

Altitude

1,177.942 km

Speed

7.273 km/s

True Right ascension

03h 21m 19s

True Declination

-5° 27' 29"

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

14:30:09

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,289.514 km

Perigee altitude

1,090.282 km

Semi-major axis

7,568.035 km

Eccentricity

0.01316

Inclination

99.7159°

RAAN

231.2704°

Arg. of periapsis

105.2238°

True anomaly

80.2018°

Mean anomaly

78.718°

Eccentric anomaly

79.45944°

Mean motion

3.29662 °/min

Orbital period

109.2 mins

BSTAR

0.000070214

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

DELTA 1 DEB, 21390 (Decayed)

DELTA 1 DEB, 21601

DELTA 1 DEB, 21687 (Decayed)

DELTA 1 DEB, 21337 (Decayed)

DELTA 1 DEB, 21357 (Decayed)

DELTA 1 DEB, 21676 (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.
10 mins	2026-03-20 11:03:52.441Z	210.008° SW	2026-03-20 11:08:52.441Z	263.734° W	26.616°	2026-03-20 11:13:52.441Z	318.774° NNW
12 mins	2026-03-20 22:29:52.441Z	27.513° NE	2026-03-20 22:34:52.441Z	88.034° E	38.551°	2026-03-20 22:41:52.441Z	177.334° S
9 mins	2026-03-21 00:18:52.441Z	341.48° N	2026-03-21 00:22:52.441Z	293.771° NW	24.286°	2026-03-21 00:27:52.441Z	244.669° WSW
10 mins	2026-03-21 08:57:52.441Z	120.891° SE	2026-03-21 09:02:52.441Z	59.705° ENE	30.146°	2026-03-21 09:07:52.441Z	5.291° NNE

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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: 5 hours ago

TLE from 5 hours ago

TLE epoch observation values (Epoch: 2026-03-20T04:35:30.283Z)

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: 5 hours ago