DELTA 1 DEB, 21355
Orbit data source: Space-Track
DELTA 1 DEB, 21355 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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21355 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 21355U 75052BZ 25291.48603191 .00000015 00000-0 13949-3 0 9991
2 21355 99.6137 281.3770 0149477 211.3889 308.6383 13.14174605650380Epoch: 2025-10-18T11:39Z
TLE epoch observation values (Epoch: 2025-10-18T11:39:53.157Z)
Latitude
21.02201°
Longitude
-97.09764°
Altitude
1,139.728 km
Speed
7.318 km/s
True Right ascension
07h 00m 21s
True Declination
20° 54' 47"
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
11:08:45
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,317.739 km
Perigee altitude
1,091.056 km
Semi-major axis
7,582.534 km
Eccentricity
0.01495
Inclination
99.6137°
RAAN
281.377°
Arg. of periapsis
211.3889°
True anomaly
307.2847°
Mean anomaly
308.6383°
Eccentric anomaly
307.96308°
Mean motion
3.28717 °/min
Orbital period
109.52 mins
BSTAR
0.00013949
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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 | 2025-10-19 21:43:39.708Z | 103.622° ESE | 2025-10-19 21:48:39.708Z | 60.564° ENE | 21.607° | 2025-10-19 21:53:39.708Z | 15.119° NNE |
| 14 mins | 2025-10-19 23:29:39.708Z | 171.065° S | 2025-10-19 23:35:39.708Z | 228.436° WSW | 44.074° | 2025-10-19 23:43:39.708Z | 342.555° N |
| 4 mins | 2025-10-20 01:23:39.708Z | 262.078° W | 2025-10-20 01:24:39.708Z | 270.224° WNW | 12.739° | 2025-10-20 01:27:39.708Z | 294.207° NW |
| 8 mins | 2025-10-20 11:01:39.708Z | 54.943° ENE | 2025-10-20 11:04:39.708Z | 85.977° E | 20.97° | 2025-10-20 11:09:39.708Z | 137.356° SSE |
| 12 mins | 2025-10-20 12:47:39.708Z | 6.27° NNE | 2025-10-20 12:53:39.708Z | 288.083° WNW | 41.482° | 2025-10-20 12:59:39.708Z | 212.6° SW |
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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