DELTA 1 DEB, 21506

Orbit data source: Space-Track

DELTA 1 DEB, 21506 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 src="https://www.satcat.com/sats-embedded/21506?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/21506?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21506, 1975-052GB

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: 10 hours ago

TLE from 10 hours ago

0 DELTA 1 DEB
1 21506U 75052GB  26191.07830017  .00000206  00000-0  59770-3 0  9997
2 21506  99.5803  40.5597 0177439  74.1341  78.0500 13.15401235679604

Epoch: 2026-07-10T01:52Z

TLE epoch observation values (Epoch: 2026-07-10T01:52:45.134Z)

Latitude

25.46254°

Longitude

-91.053°

Altitude

1,179.717 km

Speed

7.278 km/s

True Right ascension

15h 00m 35s

True Declination

25° 20' 12"

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

00:16:44

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,334.137 km

Perigee altitude

1,065.217 km

Semi-major axis

7,577.814 km

Eccentricity

0.01774

Inclination

99.5803°

RAAN

40.5597°

Arg. of periapsis

74.1341°

True anomaly

80.04801°

Mean anomaly

78.05°

Eccentric anomaly

79.04813°

Mean motion

3.29024 °/min

Orbital period

109.41 mins

BSTAR

0.0005977

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

DELTA 1 DEB, 21318 (Decayed)

DELTA 1 DEB, 26843

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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.
8 mins	2026-07-10 12:14:29.497Z	96.499° ESE	2026-07-10 12:18:29.497Z	58.479° ENE	16.842°	2026-07-10 12:22:29.497Z	19.634° NNE
11 mins	2026-07-10 14:00:29.497Z	169.237° S	2026-07-10 14:05:29.497Z	228.484° WSW	44.481°	2026-07-10 14:11:29.497Z	342.661° N
8 mins	2026-07-11 01:29:29.497Z	56.53° ENE	2026-07-11 01:33:29.497Z	98.078° ESE	19.041°	2026-07-11 01:37:29.497Z	134.918° SE
11 mins	2026-07-11 03:16:29.497Z	6.262° NNE	2026-07-11 03:21:29.497Z	280.778° WNW	42.823°	2026-07-11 03:27:29.497Z	208.649° SW

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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, 21506 on other resources

View DELTA 1 DEB, 21506 on Heavens-Above

View DELTA 1 DEB, 21506 on Keep Track

View DELTA 1 DEB, 21506 on Celestrak

View DELTA 1 DEB, 21506 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, 21506

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: 2026-07-10T01:52:45.134Z)

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, 21506 on other resources

Documentation

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