DELTA 1 DEB, 21499

Orbit data source: Space-Track

DELTA 1 DEB, 21499 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/21499?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/21499?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

21499, 1975-052FU

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 21499U 75052FU  26213.82215334  .00001672  00000-0  29093-2 0  9997
2 21499  99.6078 343.0618 0143517 152.3485   3.2577 13.41171971700589

Epoch: 2026-08-01T19:43Z

TLE epoch observation values (Epoch: 2026-08-01T19:43:54.048Z)

Latitude

23.96096°

Longitude

-79.04995°

Altitude

1,000.46 km

Speed

7.406 km/s

True Right ascension

11h 09m 24s

True Declination

23° 50' 16"

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

17:10:46

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,209.58 km

Perigee altitude

994.868 km

Semi-major axis

7,480.361 km

Eccentricity

0.01435

Inclination

99.6078°

RAAN

343.0618°

Arg. of periapsis

152.3485°

True anomaly

3.35286°

Mean anomaly

3.2577°

Eccentric anomaly

3.30511°

Mean motion

3.35474 °/min

Orbital period

107.31 mins

BSTAR

0.0029093

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, 21343 (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.
8 mins	2026-08-03 06:56:19.978Z	99.251° ESE	2026-08-03 07:00:19.978Z	62.911° ENE	18.05°	2026-08-03 07:04:19.978Z	22.619° NE
12 mins	2026-08-03 08:40:19.978Z	168.907° S	2026-08-03 08:45:19.978Z	205.961° SW	44.124°	2026-08-03 08:52:19.978Z	343.149° N
10 mins	2026-08-03 21:42:19.978Z	12.983° NNE	2026-08-03 21:47:19.978Z	222.03° SW	44.397°	2026-08-03 21:52:19.978Z	199.008° SSW
4 mins	2026-08-03 23:30:19.978Z	319.956° NNW	2026-08-03 23:31:19.978Z	309.758° NW	13.091°	2026-08-03 23:34:19.978Z	279.596° WNW

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, 21499 on other resources

View DELTA 1 DEB, 21499 on Heavens-Above

View DELTA 1 DEB, 21499 on Keep Track

View DELTA 1 DEB, 21499 on Celestrak

View DELTA 1 DEB, 21499 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, 21499

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: 2026-08-01T19:43:54.048Z)

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, 21499 on other resources

Documentation

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