DELTA 1 DEB, 21566

Orbit data source: Space-Track

DELTA 1 DEB, 21566 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/21566?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21566, 1975-052HL

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, 0.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 2 weeks ago

TLE from 2 weeks ago

0 DELTA 1 DEB
1 21566U 75052HL  26151.96457519  .00000149  00000-0  61044-3 0  9992
2 21566  99.5726 161.7005 0324693 176.3098 214.6753 12.83920388641587

Epoch: 2026-05-31T23:08Z

TLE epoch observation values (Epoch: 2026-05-31T23:08:59.296Z)

Latitude

28.53789°

Longitude

-80.2418°

Altitude

1,537.372 km

Speed

7.003 km/s

True Right ascension

10h 25m 51s

True Declination

28° 24' 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

20:16:32

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,573.182 km

Perigee altitude

1,073.073 km

Semi-major axis

7,701.265 km

Eccentricity

0.03247

Inclination

99.5726°

RAAN

161.7005°

Arg. of periapsis

176.3098°

True anomaly

212.62739°

Mean anomaly

214.6753°

Eccentric anomaly

213.64459°

Mean motion

3.21144 °/min

Orbital period

112.1 mins

BSTAR

0.00061044

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

DELTA 1 DEB, 21350 (Decayed)

DELTA 1 DEB, 21519 (Decayed)

DELTA 1 DEB, 21685 (Decayed)

DELTA 1 DEB, 21539 (Decayed)

DELTA 1 DEB, 21505 (Decayed)

DELTA 1 DEB, 21440 (Decayed)

DELTA 1 DEB, 21334 (Decayed)

DELTA 1 DEB, 21337 (Decayed)

DELTA 1 DEB, 21390 (Decayed)

DELTA 1 DEB, 21376 (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	2026-06-18 12:25:27.652Z	37.354° NE	2026-06-18 12:30:27.652Z	92.31° ESE	27.265°	2026-06-18 12:35:27.652Z	151.933° SSE
10 mins	2026-06-18 14:16:27.652Z	355.611° N	2026-06-18 14:21:27.652Z	290.297° WNW	32.901°	2026-06-18 14:26:27.652Z	229.916° WSW
11 mins	2026-06-18 23:09:27.652Z	117.747° SE	2026-06-18 23:15:27.652Z	59.708° ENE	28.205°	2026-06-18 23:20:27.652Z	9.518° NNE
14 mins	2026-06-19 00:58:27.652Z	186.161° SSW	2026-06-19 01:05:27.652Z	262.141° W	38.724°	2026-06-19 01:12:27.652Z	335.077° 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, 21566 on other resources

View DELTA 1 DEB, 21566 on Heavens-Above

View DELTA 1 DEB, 21566 on Keep Track

View DELTA 1 DEB, 21566 on Celestrak

View DELTA 1 DEB, 21566 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, 21566

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 weeks ago

TLE from 2 weeks ago

TLE epoch observation values (Epoch: 2026-05-31T23:08:59.296Z)

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, 21566 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 weeks ago