DELTA 1 DEB, 21498

Orbit data source: Space-Track

DELTA 1 DEB, 21498 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/21498?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/21498?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

21498, 1975-052FT

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: 16 hours ago

TLE from 16 hours ago

0 DELTA 1 DEB
1 21498U 75052FT  25291.79264416 -.00000243  00000-0 -62021-3 0  9996
2 21498  99.6970 230.6817 0262146 246.2424 139.8346 12.95145987624892

Epoch: 2025-10-18T19:01Z

TLE epoch observation values (Epoch: 2025-10-18T19:01:24.455Z)

Latitude

27.5706°

Longitude

-87.28246°

Altitude

1,439.964 km

Speed

7.071 km/s

True Right ascension

15h 02m 21s

True Declination

27° 26' 31"

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

06:12:34

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,479.257 km

Perigee altitude

1,077.824 km

Semi-major axis

7,656.677 km

Eccentricity

0.02621

Inclination

99.697°

RAAN

230.6817°

Arg. of periapsis

246.2424°

True anomaly

141.72443°

Mean anomaly

139.8346°

Eccentric anomaly

140.78422°

Mean motion

3.23953 °/min

Orbital period

111.13 mins

BSTAR

-0.00062021

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, 21335 (Decayed)

DELTA 1 DEB, 21348 (Decayed)

DELTA 1 DEB, 21381 (Decayed)

DELTA 1 DEB, 21505 (Decayed)

DELTA 1 DEB, 21340 (Decayed)

DELTA 1 DEB, 21685 (Decayed)

DELTA 1 DEB, 21321 (Decayed)

DELTA 1 DEB, 21679 (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.
14 mins	2025-10-19 19:06:17.236Z	132.784° SE	2025-10-19 19:12:17.236Z	73.137° E	37.051°	2025-10-19 19:20:17.236Z	356.363° N
13 mins	2025-10-19 20:56:17.236Z	204.79° SW	2025-10-19 21:02:17.236Z	266.422° W	32.091°	2025-10-19 21:09:17.236Z	328.168° NNW
13 mins	2025-10-20 08:36:17.236Z	23.187° NE	2025-10-20 08:42:17.236Z	96.33° ESE	42.38°	2025-10-20 08:49:17.236Z	182.972° SSW
10 mins	2025-10-20 10:26:17.236Z	347.083° N	2025-10-20 10:31:17.236Z	300.549° NW	24.617°	2025-10-20 10:36:17.236Z	253.388° W

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, 21498 on other resources

View DELTA 1 DEB, 21498 on Heavens-Above

View DELTA 1 DEB, 21498 on Keep Track

View DELTA 1 DEB, 21498 on Celestrak

View DELTA 1 DEB, 21498 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, 21498

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 16 hours ago

TLE from 16 hours ago

TLE epoch observation values (Epoch: 2025-10-18T19:01:24.455Z)

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, 21498 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 16 hours ago