DELTA 1 DEB, 21287

Orbit data source: Space-Track

DELTA 1 DEB, 21287 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/21287?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/21287?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

21287, 1975-052Y

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, 0.5 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 DELTA 1 DEB
1 21287U 75052Y   25316.32821341  .00000039  00000-0  19216-3 0  9994
2 21287  99.7000 113.4463 0131393  45.4904  17.7571 13.17942650660979

Epoch: 2025-11-12T07:52Z

TLE epoch observation values (Epoch: 2025-11-12T07:52:37.638Z)

Latitude

62.19241°

Longitude

-75.22284°

Altitude

1,108.53 km

Speed

7.35 km/s

True Right ascension

06h 18m 32s

True Declination

62° 03' 25"

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

11:54:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,289.371 km

Perigee altitude

1,090.493 km

Semi-major axis

7,568.069 km

Eccentricity

0.01314

Inclination

99.7°

RAAN

113.4463°

Arg. of periapsis

45.4904°

True anomaly

18.22358°

Mean anomaly

17.7571°

Eccentric anomaly

17.98961°

Mean motion

3.29659 °/min

Orbital period

109.2 mins

BSTAR

0.00019216

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	2025-11-12 22:44:23.159Z	31.29° NE	2025-11-12 22:50:23.159Z	97.426° ESE	33.574°	2025-11-12 22:56:23.159Z	164.358° S
11 mins	2025-11-13 00:33:23.159Z	350.821° N	2025-11-13 00:38:23.159Z	287.36° WNW	31.139°	2025-11-13 00:44:23.159Z	231.255° WSW
8 mins	2025-11-13 09:14:23.159Z	102.253° ESE	2025-11-13 09:17:23.159Z	67.674° E	23.579°	2025-11-13 09:22:23.159Z	12.52° NNE
11 mins	2025-11-13 11:00:23.159Z	187.694° SSW	2025-11-13 11:05:23.159Z	268.768° W	38.955°	2025-11-13 11:11:23.159Z	335.672° 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, 21287 on other resources

View DELTA 1 DEB, 21287 on Heavens-Above

View DELTA 1 DEB, 21287 on Keep Track

View DELTA 1 DEB, 21287 on Celestrak

View DELTA 1 DEB, 21287 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, 21287

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2025-11-12T07:52:37.638Z)

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, 21287 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago