DELTA 1 DEB, 21331

Orbit data source: Space-Track

DELTA 1 DEB, 21331 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/21331?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/21331?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

21331, 1975-052AZ

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: 1 day ago

TLE from 1 day ago

0 DELTA 1 DEB
1 21331U 75052AZ  26168.14671962  .00000009  00000-0  93422-4 0  9991
2 21331  99.6554  13.7038 0027037  97.3574  27.2630 13.39765966716870

Epoch: 2026-06-17T03:31Z

TLE epoch observation values (Epoch: 2026-06-17T03:31:16.575Z)

Latitude

54.18213°

Longitude

-110.95988°

Altitude

1,100.984 km

Speed

7.316 km/s

True Right ascension

13h 49m 04s

True Declination

54° 01' 35"

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

21:52:28

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,127.703 km

Perigee altitude

1,087.225 km

Semi-major axis

7,485.601 km

Eccentricity

0.0027

Inclination

99.6554°

RAAN

13.7038°

Arg. of periapsis

97.3574°

True anomaly

27.40535°

Mean anomaly

27.263°

Eccentric anomaly

27.33413°

Mean motion

3.35122 °/min

Orbital period

107.42 mins

BSTAR

0.000093422

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, 21456 (Decayed)

DELTA 1 DEB, 21334 (Decayed)

DELTA 1 DEB, 21505 (Decayed)

DELTA 1 DEB, 21350 (Decayed)

DELTA 1 DEB, 21562 (Decayed)

DELTA 1 DEB, 21685 (Decayed)

DELTA 1 DEB, 21376 (Decayed)

DELTA 1 DEB, 37629 (Decayed)

DELTA 1 DEB, 21566

DELTA 1 DEB, 21519 (Decayed)

DELTA 1 DEB, 21539 (Decayed)

DELTA 1 DEB, 21440 (Decayed)

DELTA 1 DEB, 21337 (Decayed)

DELTA 1 DEB, 21390 (Decayed)

DELTA 1 DEB, 35533 (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.
12 mins	2026-06-18 13:04:07.362Z	143.173° SSE	2026-06-18 13:10:07.362Z	64.644° ENE	39.275°	2026-06-18 13:16:07.362Z	354.954° N
9 mins	2026-06-18 14:52:07.362Z	220.623° SW	2026-06-18 14:56:07.362Z	264.579° W	22.911°	2026-06-18 15:01:07.362Z	316.834° NNW
11 mins	2026-06-19 02:07:07.362Z	30.32° NE	2026-06-19 02:12:07.362Z	104.254° ESE	37.981°	2026-06-19 02:18:07.362Z	174.804° S
8 mins	2026-06-19 03:54:07.362Z	340.202° N	2026-06-19 03:57:07.362Z	304.574° NW	25.159°	2026-06-19 04:02:07.362Z	247.168° WSW

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, 21331 on other resources

View DELTA 1 DEB, 21331 on Heavens-Above

View DELTA 1 DEB, 21331 on Keep Track

View DELTA 1 DEB, 21331 on Celestrak

View DELTA 1 DEB, 21331 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, 21331

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-06-17T03:31:16.575Z)

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, 21331 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago