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

Small (<0.1 m²)

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

TLE from 13 hours ago

0 DELTA 1 DEB
1 21331U 75052AZ  25350.34627854  .00000026  00000-0  12534-3 0  9999
2 21331  99.6701 199.5129 0026001 182.6498   0.3348 13.39741378692390

Epoch: 2025-12-16T08:18Z

TLE epoch observation values (Epoch: 2025-12-16T08:18:38.465Z)

Latitude

-3.07315°

Longitude

169.09934°

Altitude

1,093.993 km

Speed

7.315 km/s

True Right ascension

01h 15m 57s

True Declination

-3° 03' 20"

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

19:42:37

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,127.02 km

Perigee altitude

1,088.093 km

Semi-major axis

7,485.693 km

Eccentricity

0.0026

Inclination

99.6701°

RAAN

199.5129°

Arg. of periapsis

182.6498°

True anomaly

0.33655°

Mean anomaly

0.3348°

Eccentric anomaly

0.33567°

Mean motion

3.35116 °/min

Orbital period

107.43 mins

BSTAR

0.00012534

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, 21431 (Decayed)

DELTA 1 DEB, 7965 (Decayed)

DELTA 1 DEB, 35533 (Decayed)

DELTA 1 DEB, 21495 (Decayed)

DELTA 1 DEB, 21539 (Decayed)

DELTA 1 DEB, 37627 (Decayed)

DELTA 1 DEB, 21521 (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.
10 mins	2025-12-17 01:57:05.587Z	42.944° NE	2025-12-17 02:02:05.587Z	99.992° ESE	25.215°	2025-12-17 02:07:05.587Z	151.119° SSE
11 mins	2025-12-17 03:43:05.587Z	358.685° N	2025-12-17 03:48:05.587Z	286.463° WNW	36.967°	2025-12-17 03:54:05.587Z	220.111° SW
6 mins	2025-12-17 12:17:05.587Z	78.407° E	2025-12-17 12:19:05.587Z	58.481° ENE	16.053°	2025-12-17 12:23:05.587Z	21.166° NNE
12 mins	2025-12-17 13:59:05.587Z	163.144° S	2025-12-17 14:04:05.587Z	158.372° S	44.886°	2025-12-17 14:11:05.587Z	345.554° N
5 mins	2025-12-17 15:49:05.587Z	252.386° W	2025-12-17 15:51:05.587Z	271.339° WNW	13.809°	2025-12-17 15:54:05.587Z	298.635° NW

Items per page:

1–5 of 5 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: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2025-12-16T08:18:38.465Z)

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: 13 hours ago