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 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, 0.050 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

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Last TLE update: 1 day ago

TLE from 1 day ago

0 DELTA 1 DEB
1 21506U 75052GB  26301.48919468  .00000240  00000-0  68434-3 0  9998
2 21506  99.5652 140.4972 0174081 175.3488 215.9744 13.15472751694126

Epoch: 2026-10-28T11:44Z

TLE epoch observation values (Epoch: 2026-10-28T11:44:26.420Z)

Latitude

29.75716°

Longitude

-77.95101°

Altitude

1,313.224 km

Speed

7.152 km/s

True Right ascension

08h 59m 59s

True Declination

29° 37' 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

13:38:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,331.312 km

Perigee altitude

1,067.491 km

Semi-major axis

7,577.539 km

Eccentricity

0.01741

Inclination

99.5652°

RAAN

140.4972°

Arg. of periapsis

175.3488°

True anomaly

214.82296°

Mean anomaly

215.9744°

Eccentric anomaly

215.39667°

Mean motion

3.29042 °/min

Orbital period

109.41 mins

BSTAR

0.00068434

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

DELTA 1 DEB, 21517 (Decayed)

DELTA 1 DEB, 21346 (Decayed)

DELTA 1 DEB, 21454 (Decayed)

DELTA 1 DEB, 21449 (Decayed)

NIMBUS 6, 7924

DELTA 1 DEB, 42660 (Decayed)

DELTA 1 DEB, 21376 (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.
7 mins	2026-10-30 00:45:19.394Z	56.348° ENE	2026-10-30 00:48:19.394Z	84.58° E	16.106°	2026-10-30 00:52:19.394Z	123.783° SE
11 mins	2026-10-30 02:32:19.394Z	10.127° NNE	2026-10-30 02:37:19.394Z	297.584° NW	76.471°	2026-10-30 02:43:19.394Z	203.455° SW
4 mins	2026-10-30 04:22:19.394Z	323.716° NNW	2026-10-30 04:24:19.394Z	304.982° NW	13.247°	2026-10-30 04:26:19.394Z	286.384° WNW
5 mins	2026-10-30 11:16:19.394Z	71.463° E	2026-10-30 11:18:19.394Z	54.452° ENE	14.428°	2026-10-30 11:21:19.394Z	29.164° NE
13 mins	2026-10-30 12:59:19.394Z	151.311° SSE	2026-10-30 13:05:19.394Z	56.578° ENE	70.871°	2026-10-30 13:12:19.394Z	350.053° N
9 mins	2026-10-30 14:49:19.394Z	229.699° WSW	2026-10-30 14:53:19.394Z	267.069° W	22.297°	2026-10-30 14:58:19.394Z	312.435° NW

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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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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: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-10-28T11:44:26.420Z)

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: 1 day ago