DELTA 1 DEB, 21598

Orbit data source: Space-Track

DELTA 1 DEB, 21598 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/21598?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21598, 1975-052HS

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: 18 hours ago

TLE from 18 hours ago

0 DELTA 1 DEB
1 21598U 75052HS  26100.94268757  .00000169  00000-0  65730-3 0  9991
2 21598  99.5615  97.7384 0348945 260.5041 123.6443 12.84321206635377

Epoch: 2026-04-10T22:37Z

TLE epoch observation values (Epoch: 2026-04-10T22:37:28.206Z)

Latitude

27.01997°

Longitude

-85.70201°

Altitude

1,482.508 km

Speed

7.052 km/s

True Right ascension

06h 11m 20s

True Declination

26° 53' 38"

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

22:50:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,590.199 km

Perigee altitude

1,052.847 km

Semi-major axis

7,699.66 km

Eccentricity

0.03489

Inclination

99.5615°

RAAN

97.7384°

Arg. of periapsis

260.5041°

True anomaly

126.89277°

Mean anomaly

123.6443°

Eccentric anomaly

125.27648°

Mean motion

3.21245 °/min

Orbital period

112.06 mins

BSTAR

0.0006573

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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.
6 mins	2026-04-11 21:10:03.040Z	64.451° ENE	2026-04-11 21:13:03.040Z	43.7° NE	12.535°	2026-04-11 21:16:03.040Z	23.788° NE
15 mins	2026-04-11 22:54:03.040Z	138.03° SSE	2026-04-11 23:01:03.040Z	65.079° ENE	39.22°	2026-04-11 23:09:03.040Z	354.736° N
14 mins	2026-04-12 00:45:03.040Z	206.459° SW	2026-04-12 00:52:03.040Z	272.706° WNW	30.297°	2026-04-12 00:59:03.040Z	327.777° NNW
7 mins	2026-04-12 10:43:03.040Z	59.47° ENE	2026-04-12 10:46:03.040Z	81.959° E	14.602°	2026-04-12 10:50:03.040Z	113.214° SE
14 mins	2026-04-12 12:31:03.040Z	17.114° NNE	2026-04-12 12:38:03.040Z	93.883° ESE	44.692°	2026-04-12 12:45:03.040Z	191.753° SSW
11 mins	2026-04-12 14:22:03.040Z	347.558° N	2026-04-12 14:27:03.040Z	308.568° NW	22.087°	2026-04-12 14:33:03.040Z	258.574° W

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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, 21598 on other resources

View DELTA 1 DEB, 21598 on Heavens-Above

View DELTA 1 DEB, 21598 on Keep Track

View DELTA 1 DEB, 21598 on Celestrak

View DELTA 1 DEB, 21598 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, 21598

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 18 hours ago

TLE from 18 hours ago

TLE epoch observation values (Epoch: 2026-04-10T22:37:28.206Z)

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, 21598 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 18 hours ago