DELTA 1 DEB, 21599

Orbit data source: Space-Track

DELTA 1 DEB, 21599 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/21599?theme=dark&initialShowStats=false

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Identifier

21599, 1975-052HT

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

Small (<0.1 m²)

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Last TLE update: 3 days ago

TLE from 3 days ago

0 DELTA 1 DEB
1 21599U 75052HT  25351.56805943  .00000031  00000-0  22596-3 0  9992
2 21599  99.8271 270.1308 0425469 190.4394 349.2913 12.72597210596204

Epoch: 2025-12-17T13:38Z

TLE epoch observation values (Epoch: 2025-12-17T13:38:00.334Z)

Latitude

1.1033°

Longitude

159.38349°

Altitude

1,050.409 km

Speed

7.478 km/s

True Right ascension

06h 01m 17s

True Declination

1° 05' 49"

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

10:34:23

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,698.391 km

Perigee altitude

1,039.176 km

Semi-major axis

7,746.92 km

Eccentricity

0.04255

Inclination

99.8271°

RAAN

270.1308°

Arg. of periapsis

190.4394°

True anomaly

348.33556°

Mean anomaly

349.2913°

Eccentric anomaly

348.81858°

Mean motion

3.18309 °/min

Orbital period

113.1 mins

BSTAR

0.00022596

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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.
9 mins	2025-12-20 16:22:37.598Z	84.014° E	2025-12-20 16:27:37.598Z	49.373° ENE	16.088°	2025-12-20 16:31:37.598Z	20.631° NNE
16 mins	2025-12-20 18:09:37.598Z	148.688° SSE	2025-12-20 18:17:37.598Z	53.206° ENE	42.936°	2025-12-20 18:25:37.598Z	350.341° N
13 mins	2025-12-20 20:02:37.598Z	216.932° SW	2025-12-20 20:08:37.598Z	263.645° W	25.868°	2025-12-20 20:15:37.598Z	319.787° NNW
6 mins	2025-12-21 06:04:37.598Z	58.728° ENE	2025-12-21 06:07:37.598Z	87.47° E	15.81°	2025-12-21 06:10:37.598Z	117.73° SE
11 mins	2025-12-21 07:54:37.598Z	9.745° NNE	2025-12-21 07:59:37.598Z	320.192° NNW	43.388°	2025-12-21 08:05:37.598Z	206.006° SW
4 mins	2025-12-21 09:48:37.598Z	323.015° NNW	2025-12-21 09:49:37.598Z	314.179° NW	12.484°	2025-12-21 09:52:37.598Z	287.323° WNW

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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, 21599 on other resources

View DELTA 1 DEB, 21599 on Heavens-Above

View DELTA 1 DEB, 21599 on Keep Track

View DELTA 1 DEB, 21599 on Celestrak

View DELTA 1 DEB, 21599 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, 21599

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2025-12-17T13:38:00.334Z)

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, 21599 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago