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 (51 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.5 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 10 hours ago

TLE from 10 hours ago

0 DELTA 1 DEB
1 21287U 75052Y   26242.37641012 -.00000031  00000-0  19212-4 0  9993
2 21287  99.7439  21.9843 0131607  82.6992 333.5990 13.17960171699310

Epoch: 2026-08-30T09:02Z

TLE epoch observation values (Epoch: 2026-08-30T09:02:01.834Z)

Latitude

54.52532°

Longitude

-105.9671°

Altitude

1,112.413 km

Speed

7.344 km/s

True Right ascension

00h 32m 27s

True Declination

54° 22' 13"

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

11:03:49

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,289.468 km

Perigee altitude

1,090.267 km

Semi-major axis

7,568.004 km

Eccentricity

0.01316

Inclination

99.7439°

RAAN

21.9843°

Arg. of periapsis

82.6992°

True anomaly

332.91841°

Mean anomaly

333.599°

Eccentric anomaly

333.25972°

Mean motion

3.29664 °/min

Orbital period

109.2 mins

BSTAR

0.000019212

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, 21374

DELTA 1 DEB, 21448

DELTA 1 DEB, 21340 (Decayed)

DELTA 1 DEB, 21464

DELTA 1 DEB, 21508 (Decayed)

DELTA 1 DEB, 37628 (Decayed)

DELTA 1 DEB, 21969

DELTA 1 DEB, 35535

DELTA 1 DEB, 21376 (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	2026-08-30 22:06:17.913Z	19.937° NNE	2026-08-30 22:12:17.913Z	104.668° ESE	43.605°	2026-08-30 22:18:17.913Z	187.004° SSW
7 mins	2026-08-30 23:56:17.913Z	333.258° NNW	2026-08-30 23:59:17.913Z	301.013° NW	19.664°	2026-08-31 00:03:17.913Z	261.25° W
11 mins	2026-08-31 08:34:17.913Z	133.766° SE	2026-08-31 08:39:17.913Z	70.465° E	35.884°	2026-08-31 08:45:17.913Z	358.375° N
9 mins	2026-08-31 10:23:17.913Z	216.638° SW	2026-08-31 10:27:17.913Z	265.333° W	26.41°	2026-08-31 10:32:17.913Z	319.897° NNW

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, 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: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-08-30T09:02:01.834Z)

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: 10 hours ago