DELTA 1 DEB, 21515

Orbit data source: Space-Track

DELTA 1 DEB, 21515 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/21515?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21515, 1975-052GL

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)

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Last TLE update: 5 hours ago

TLE from 5 hours ago

0 DELTA 1 DEB
1 21515U 75052GL  25300.46172233  .00000243  00000-0  79780-3 0  9994
2 21515  99.7317  10.1996 0272603  41.3902  78.8551 12.98698821632477

Epoch: 2025-10-27T11:04Z

TLE epoch observation values (Epoch: 2025-10-27T11:04:52.809Z)

Latitude

55.53302°

Longitude

2.31021°

Altitude

1,241.523 km

Speed

7.256 km/s

True Right ascension

13h 38m 22s

True Declination

55° 22' 57"

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

11:06:35

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,472.904 km

Perigee altitude

1,056.219 km

Semi-major axis

7,642.699 km

Eccentricity

0.02726

Inclination

99.7317°

RAAN

10.1996°

Arg. of periapsis

41.3902°

True anomaly

81.93881°

Mean anomaly

78.8551°

Eccentric anomaly

80.39511°

Mean motion

3.24843 °/min

Orbital period

110.82 mins

BSTAR

0.0007978

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

DELTA 1 DEB, 21563 (Decayed)

DELTA 1 DEB, 21510 (Decayed)

DELTA 1 DEB, 21544 (Decayed)

DELTA 1 DEB, 21346 (Decayed)

DELTA 1 DEB, 21378 (Decayed)

DELTA 1 DEB, 21491 (Decayed)

DELTA 1 DEB, 21328 (Decayed)

DELTA 1 DEB, 21687 (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.
13 mins	2025-10-27 16:37:03.086Z	34.763° NE	2025-10-27 16:43:03.086Z	90.843° ESE	28.812°	2025-10-27 16:50:03.086Z	157.397° SSE
13 mins	2025-10-27 18:27:03.086Z	359.907° N	2025-10-27 18:33:03.086Z	284.862° WNW	36.932°	2025-10-27 18:40:03.086Z	221.216° SW
8 mins	2025-10-28 03:17:03.086Z	99.637° ESE	2025-10-28 03:21:03.086Z	53.387° ENE	20.929°	2025-10-28 03:25:03.086Z	13.466° NNE
11 mins	2025-10-28 05:04:03.086Z	181.72° SSW	2025-10-28 05:09:03.086Z	246.963° WSW	40.409°	2025-10-28 05:15:03.086Z	336.079° NNW

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, 21515 on other resources

View DELTA 1 DEB, 21515 on Heavens-Above

View DELTA 1 DEB, 21515 on Keep Track

View DELTA 1 DEB, 21515 on Celestrak

View DELTA 1 DEB, 21515 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, 21515

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 5 hours ago

TLE from 5 hours ago

TLE epoch observation values (Epoch: 2025-10-27T11:04:52.809Z)

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, 21515 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 5 hours ago