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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ISO8601 Format

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: 1 week ago

TLE from 1 week ago

0 DELTA 1 DEB
1 21599U 75052HT  26164.95876375  .00001336  00000-0  45841-2 0  9991
2 21599  99.8290  64.0527 0426061 163.5515 217.7611 12.73000809618903

Epoch: 2026-06-13T23:00Z

TLE epoch observation values (Epoch: 2026-06-13T23:00:37.188Z)

Latitude

18.15802°

Longitude

173.38956°

Altitude

1,637.928 km

Speed

6.932 km/s

True Right ascension

04h 03m 14s

True Declination

18° 04' 03"

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

00:56:42

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,697.141 km

Perigee altitude

1,037.148 km

Semi-major axis

7,745.282 km

Eccentricity

0.04261

Inclination

99.829°

RAAN

64.0527°

Arg. of periapsis

163.5515°

True anomaly

214.89349°

Mean anomaly

217.7611°

Eccentric anomaly

216.31538°

Mean motion

3.1841 °/min

Orbital period

113.06 mins

BSTAR

0.0045841

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

DELTA 1 DEB, 21518 (Decayed)

DELTA 1 DEB, 21494 (Decayed)

DELTA 1 DEB, 21349 (Decayed)

DELTA 1 DEB, 21328 (Decayed)

DELTA 1 DEB, 21563 (Decayed)

DELTA 1 DEB, 21683 (Decayed)

DELTA 1 DEB, 21519 (Decayed)

DELTA 1 DEB, 21543 (Decayed)

DELTA 1 DEB, 21321 (Decayed)

DELTA 1 DEB, 21454 (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.
14 mins	2026-06-22 16:24:07.692Z	138.782° SSE	2026-06-22 16:31:07.692Z	63.066° ENE	39.009°	2026-06-22 16:38:07.692Z	355.102° N
13 mins	2026-06-22 18:16:07.692Z	207.788° SW	2026-06-22 18:22:07.692Z	260.076° W	28.742°	2026-06-22 18:29:07.692Z	324.365° NNW
11 mins	2026-06-23 06:07:07.692Z	16.926° NNE	2026-06-23 06:12:07.692Z	122.85° SE	44.845°	2026-06-23 06:18:07.692Z	194.016° SSW
4 mins	2026-06-23 08:01:07.692Z	320.428° NNW	2026-06-23 08:02:07.692Z	310.011° NW	14.492°	2026-06-23 08:05:07.692Z	279.1° 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: 1 week ago

TLE from 1 week ago

TLE epoch observation values (Epoch: 2026-06-13T23:00:37.188Z)

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: 1 week ago