DELTA 1 DEB, 21439
Orbit data source: Space-Track
DELTA 1 DEB, 21439 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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21439 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
Unknown
Mission
Spacecraft
Bus & Motor
Unknown
Mass
Unknown
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Unknown shape, 0.1 m
Radar Cross Section
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 DELTA 1 DEB
1 21439U 75052DX 25287.94474092 .00005835 00000-0 84167-2 0 9990
2 21439 100.0064 292.7040 0344568 283.0475 73.2403 13.34366617580096Epoch: 2025-10-14T22:40Z
TLE epoch observation values (Epoch: 2025-10-14T22:40:25.615Z)
Latitude
-0.00004°
Longitude
-71.12862°
Altitude
1,066.771 km
Speed
7.351 km/s
True Right ascension
19h 30m 48s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
21:16:52
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,386.297 km
Perigee altitude
869.045 km
Semi-major axis
7,505.808 km
Eccentricity
0.03446
Inclination
100.0064°
RAAN
292.704°
Arg. of periapsis
283.0475°
True anomaly
77.06571°
Mean anomaly
73.2403°
Eccentric anomaly
75.14858°
Mean motion
3.3377 °/min
Orbital period
107.86 mins
BSTAR
0.0084167
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Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.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 | 2025-10-17 12:28:55.617Z | 30.937° NE | 2025-10-17 12:35:55.617Z | 100.446° ESE | 33.087° | 2025-10-17 12:41:55.617Z | 162.373° S |
| 12 mins | 2025-10-17 14:15:55.617Z | 358.686° N | 2025-10-17 14:21:55.617Z | 295.463° NW | 34.749° | 2025-10-17 14:27:55.617Z | 230.696° WSW |
| 9 mins | 2025-10-17 22:49:55.617Z | 96.485° ESE | 2025-10-17 22:53:55.617Z | 55.372° ENE | 23.274° | 2025-10-17 22:58:55.617Z | 11.171° NNE |
| 13 mins | 2025-10-18 00:33:55.617Z | 175.552° S | 2025-10-18 00:38:55.617Z | 240.071° WSW | 43.35° | 2025-10-18 00:46:55.617Z | 340.856° N |
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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