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.

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Iframe URL

https://www.satcat.com/sats-embedded/21498?theme=dark&initialShowStats=false

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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 (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

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 11 hours ago

TLE from 11 hours ago

0 DELTA 1 DEB
1 21498U 75052FT  26111.28320206  .00000563  00000-0  18258-2 0  9997
2 21498  99.7106  34.0607 0261362 189.4996 324.2010 12.95266242648777

Epoch: 2026-04-21T06:47Z

TLE epoch observation values (Epoch: 2026-04-21T06:47:48.657Z)

Latitude

27.7025°

Longitude

-92.12471°

Altitude

1,123.389 km

Speed

7.369 km/s

True Right ascension

14h 36m 45s

True Declination

27° 34' 05"

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

00:57:58

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,478.171 km

Perigee altitude

1,077.963 km

Semi-major axis

7,656.204 km

Eccentricity

0.02614

Inclination

99.7106°

RAAN

34.0607°

Arg. of periapsis

189.4996°

True anomaly

322.40177°

Mean anomaly

324.201°

Eccentric anomaly

323.30619°

Mean motion

3.23984 °/min

Orbital period

111.12 mins

BSTAR

0.0018258

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Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)

DELTA 1 DEB, 21435 (Decayed)

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DELTA 1 DEB Visibility forecast

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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.
16 mins	2026-04-21 19:03:09.436Z	176.35° S	2026-04-21 19:11:09.436Z	242.183° WSW	42.073°	2026-04-21 19:19:09.436Z	338.568° N
10 mins	2026-04-22 06:46:09.436Z	41.986° NE	2026-04-22 06:50:09.436Z	87.182° E	28.435°	2026-04-22 06:56:09.436Z	156.147° SSE
11 mins	2026-04-22 08:35:09.436Z	356.616° N	2026-04-22 08:40:09.436Z	297.113° NW	33.871°	2026-04-22 08:46:09.436Z	227.615° WSW
12 mins	2026-04-22 17:23:09.436Z	112.147° ESE	2026-04-22 17:28:09.436Z	66.215° ENE	28.146°	2026-04-22 17:35:09.436Z	4.197° NNE

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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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: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2026-04-21T06:47:48.657Z)

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: 11 hours ago