DELTA 1 DEB, 21501
Orbit data source: Space-Track
DELTA 1 DEB, 21501 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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21501 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 21501U 75052FW 25287.26144220 .00000271 00000-0 11999-2 0 9994
2 21501 99.8014 221.0783 0551340 343.6575 175.4951 12.47730166566686Epoch: 2025-10-14T06:16Z
TLE epoch observation values (Epoch: 2025-10-14T06:16:28.606Z)
Latitude
20.07458°
Longitude
-72.4904°
Altitude
1,908.056 km
Speed
6.745 km/s
True Right ascension
02h 58m 43s
True Declination
19° 58' 46"
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
09:57:33
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,904.215 km
Perigee altitude
1,038.658 km
Semi-major axis
7,849.574 km
Eccentricity
0.05513
Inclination
99.8014°
RAAN
221.0783°
Arg. of periapsis
343.6575°
True anomaly
175.95935°
Mean anomaly
175.4951°
Eccentric anomaly
175.73029°
Mean motion
3.12086 °/min
Orbital period
115.35 mins
BSTAR
0.0011999
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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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2025-10-15 18:07:23.074Z | 108.423° ESE | 2025-10-15 18:12:23.074Z | 61.08° ENE | 23.775° | 2025-10-15 18:18:23.074Z | 7.709° NNE |
| 13 mins | 2025-10-15 20:00:23.074Z | 183.201° SSW | 2025-10-15 20:05:23.074Z | 249.677° W | 40.923° | 2025-10-15 20:13:23.074Z | 338.941° N |
| 6 mins | 2025-10-16 06:14:23.074Z | 68.402° E | 2025-10-16 06:17:23.074Z | 86.383° E | 12.739° | 2025-10-16 06:20:23.074Z | 103.861° ESE |
| 19 mins | 2025-10-16 08:03:23.074Z | 22.984° NE | 2025-10-16 08:12:23.074Z | 112.212° ESE | 41.938° | 2025-10-16 08:22:23.074Z | 182.146° SSW |
| 16 mins | 2025-10-16 09:57:23.074Z | 356.336° N | 2025-10-16 10:04:23.074Z | 304.234° NW | 31.343° | 2025-10-16 10:13:23.074Z | 239.605° WSW |
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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