DELTA 1 DEB, 21355

Orbit data source: Space-Track

DELTA 1 DEB, 21355 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/21355?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21355, 1975-052BZ

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: 13 hours ago

TLE from 13 hours ago

0 DELTA 1 DEB
1 21355U 75052BZ  26168.86427343 -.00000023  00000-0  40100-4 0  9990
2 21355  99.6389 141.4219 0150130   5.4340  56.1046 13.14194850682228

Epoch: 2026-06-17T20:44Z

TLE epoch observation values (Epoch: 2026-06-17T20:44:33.224Z)

Latitude

61.52726°

Longitude

-93.98547°

Altitude

1,155.084 km

Speed

7.311 km/s

True Right ascension

08h 13m 04s

True Declination

61° 23' 26"

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

20:20:01

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,318.156 km

Perigee altitude

1,090.485 km

Semi-major axis

7,582.458 km

Eccentricity

0.01501

Inclination

99.6389°

RAAN

141.4219°

Arg. of periapsis

5.434°

True anomaly

57.54754°

Mean anomaly

56.1046°

Eccentric anomaly

56.82457°

Mean motion

3.28722 °/min

Orbital period

109.52 mins

BSTAR

0.0000401

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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.
11 mins	2026-06-18 09:50:55.834Z	43.547° NE	2026-06-18 09:55:55.834Z	91.823° ESE	24.921°	2026-06-18 10:01:55.834Z	147.574° SSE
12 mins	2026-06-18 11:38:55.834Z	2.825° NNE	2026-06-18 11:43:55.834Z	304.21° NW	40.381°	2026-06-18 11:50:55.834Z	215.595° SW
6 mins	2026-06-18 20:22:55.834Z	82.164° E	2026-06-18 20:25:55.834Z	51.565° ENE	16.586°	2026-06-18 20:28:55.834Z	23.386° NE
11 mins	2026-06-18 22:07:55.834Z	166.708° S	2026-06-18 22:12:55.834Z	313.974° NW	44.624°	2026-06-18 22:18:55.834Z	344.191° N

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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, 21355 on other resources

View DELTA 1 DEB, 21355 on Heavens-Above

View DELTA 1 DEB, 21355 on Keep Track

View DELTA 1 DEB, 21355 on Celestrak

View DELTA 1 DEB, 21355 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, 21355

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-06-17T20:44:33.224Z)

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, 21355 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 13 hours ago