DELTA 1 DEB, 21550
Orbit data source: Space-Track
DELTA 1 DEB, 21550 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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21550 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: 1 day ago
TLE from 1 day ago
0 DELTA 1 DEB
1 21550U 75052HE 25350.23096748 .00000637 00000-0 27074-2 0 9994
2 21550 99.8547 272.7469 0549804 16.2700 140.4465 12.45992045569678Epoch: 2025-12-16T05:32Z
TLE epoch observation values (Epoch: 2025-12-16T05:32:35.590Z)
Latitude
19.1759°
Longitude
-72.07231°
Altitude
1,825.778 km
Speed
6.82 km/s
True Right ascension
06h 24m 46s
True Declination
19° 04' 60"
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
08:09:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,910.717 km
Perigee altitude
1,046.768 km
Semi-major axis
7,856.879 km
Eccentricity
0.05498
Inclination
99.8547°
RAAN
272.7469°
Arg. of periapsis
16.27°
True anomaly
144.25346°
Mean anomaly
140.4465°
Eccentric anomaly
142.36986°
Mean motion
3.11651 °/min
Orbital period
115.51 mins
BSTAR
0.0027074
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-12-17 10:11:30.502Z | 339.66° N | 2025-12-17 10:16:30.502Z | 303.215° NW | 16.945° | 2025-12-17 10:21:30.502Z | 271.169° WNW |
| 8 mins | 2025-12-17 17:29:30.502Z | 100.145° ESE | 2025-12-17 17:33:30.502Z | 54.312° ENE | 21.931° | 2025-12-17 17:37:30.502Z | 14.108° NNE |
| 11 mins | 2025-12-17 19:21:30.502Z | 185.435° SSW | 2025-12-17 19:26:30.502Z | 259.592° W | 39.377° | 2025-12-17 19:32:30.502Z | 335.2° NNW |
| 5 mins | 2025-12-18 05:35:30.502Z | 75.144° E | 2025-12-18 05:37:30.502Z | 87.77° E | 11.664° | 2025-12-18 05:40:30.502Z | 105.741° ESE |
| 17 mins | 2025-12-18 07:24:30.502Z | 23.92° NE | 2025-12-18 07:32:30.502Z | 113.974° SE | 41.841° | 2025-12-18 07:41:30.502Z | 181.808° SSW |
| 5 mins | 2025-12-18 09:19:30.502Z | 349.585° N | 2025-12-18 09:24:30.502Z | 306.988° NW | 29.289° | 2025-12-18 09:24:30.502Z | 306.988° NW |
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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