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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/21355?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/21355?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

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

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 17 hours ago

TLE from 17 hours ago

0 DELTA 1 DEB
1 21355U 75052BZ  26091.89014782 -.00000004  00000-0  88854-4 0  9994
2 21355  99.6336  71.4542 0149812 184.6288 205.0392 13.14189682672110

Epoch: 2026-04-01T21:21Z

TLE epoch observation values (Epoch: 2026-04-01T21:21:48.771Z)

Latitude

28.55013°

Longitude

-84.51809°

Altitude

1,313.647 km

Speed

7.153 km/s

True Right ascension

04h 24m 43s

True Declination

28° 24' 59"

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

20:30:59

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,317.935 km

Perigee altitude

1,090.746 km

Semi-major axis

7,582.477 km

Eccentricity

0.01498

Inclination

99.6336°

RAAN

71.4542°

Arg. of periapsis

184.6288°

True anomaly

204.32477°

Mean anomaly

205.0392°

Eccentric anomaly

204.68078°

Mean motion

3.2872 °/min

Orbital period

109.52 mins

BSTAR

0.000088854

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

DELTA 1 DEB, 21687 (Decayed)

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

DELTA 1 DEB Visibility forecast

Loading observer location...
Set Observer location

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	2026-04-02 21:06:37.138Z	114.194° SE	2026-04-02 21:12:37.138Z	58.615° ENE	25.572°	2026-04-02 21:17:37.138Z	10.793° NNE
13 mins	2026-04-02 22:53:37.138Z	181.363° SSW	2026-04-02 22:59:37.138Z	249.702° W	41.169°	2026-04-02 23:06:37.138Z	336.989° NNW
9 mins	2026-04-03 10:24:37.138Z	46.175° ENE	2026-04-03 10:28:37.138Z	91.852° ESE	25.6°	2026-04-03 10:33:37.138Z	147.904° SSE
11 mins	2026-04-03 12:11:37.138Z	0.206° NNE	2026-04-03 12:16:37.138Z	302.508° NW	36.437°	2026-04-03 12:22:37.138Z	223.009° SW

Items per page:

1–4 of 4 items

of 1 page

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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: 17 hours ago

TLE from 17 hours ago

TLE epoch observation values (Epoch: 2026-04-01T21:21:48.771Z)

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: 17 hours ago