DELTA 1 DEB, 21388

Orbit data source: Space-Track

DELTA 1 DEB, 21388 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/21388?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/21388?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

21388, 1975-052DJ

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 (50 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: 2 days ago

TLE from 2 days ago

0 DELTA 1 DEB
1 21388U 75052DJ  25315.28350093  .00000145  00000-0  28673-3 0  9996
2 21388  99.5514 196.7791 0072534  85.1835  36.3138 13.50623522697913

Epoch: 2025-11-11T06:48Z

TLE epoch observation values (Epoch: 2025-11-11T06:48:14.480Z)

Latitude

56.85462°

Longitude

-121.10052°

Altitude

1,035.999 km

Speed

7.361 km/s

True Right ascension

02h 06m 31s

True Declination

56° 42' 10"

Sunlit

Object was in full shadow 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

15:32:49

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,121.263 km

Perigee altitude

1,013.254 km

Semi-major axis

7,445.395 km

Eccentricity

0.00725

Inclination

99.5514°

RAAN

196.7791°

Arg. of periapsis

85.1835°

True anomaly

36.80965°

Mean anomaly

36.3138°

Eccentric anomaly

36.56136°

Mean motion

3.3784 °/min

Orbital period

106.56 mins

BSTAR

0.00028673

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, 21440 (Decayed)

DELTA 1 DEB, 42660 (Decayed)

DELTA 1 DEB, 21600 (Decayed)

DELTA 1 DEB, 21381 (Decayed)

DELTA 1 DEB, 21474 (Decayed)

DELTA 1 DEB, 37629 (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	2025-11-13 05:00:39.052Z	17.587° NNE	2025-11-13 05:06:39.052Z	74.604° E	43.989°	2025-11-13 05:12:39.052Z	189.513° SSW
6 mins	2025-11-13 06:48:39.052Z	330.973° NNW	2025-11-13 06:51:39.052Z	298.153° NW	17.433°	2025-11-13 06:54:39.052Z	267.19° W
9 mins	2025-11-13 15:14:39.052Z	122.566° SE	2025-11-13 15:18:39.052Z	71.801° E	30.378°	2025-11-13 15:23:39.052Z	6.596° NNE
10 mins	2025-11-13 16:59:39.052Z	204.321° SW	2025-11-13 17:03:39.052Z	255.078° W	30.37°	2025-11-13 17:09:39.052Z	327.575° NNW

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 ascending 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 ascending order

Check out DELTA 1 DEB, 21388 on other resources

View DELTA 1 DEB, 21388 on Heavens-Above

View DELTA 1 DEB, 21388 on Keep Track

View DELTA 1 DEB, 21388 on Celestrak

View DELTA 1 DEB, 21388 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, 21388

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2025-11-11T06:48:14.480Z)

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, 21388 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago