DELTA 1 DEB, 21551
Orbit data source: Space-Track
DELTA 1 DEB, 21551 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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21551 intel report (Beta)
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Expand to show TLE details & historyLast TLE update: 6 hours ago
TLE from 6 hours ago
0 DELTA 1 DEB
1 21551U 75052HF 26127.19736191 .00000138 00000-0 40140-3 0 9992
2 21551 99.7875 24.3390 0106957 49.4832 101.7951 13.24613444689199Epoch: 2026-05-07T04:44Z
TLE epoch observation values (Epoch: 2026-05-07T04:44:12.069Z)
Latitude
27.12944°
Longitude
-86.71317°
Altitude
1,187.646 km
Speed
7.254 km/s
True Right ascension
13h 57m 32s
True Declination
26° 59' 53"
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
18:15:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,245.163 km
Perigee altitude
1,083.815 km
Semi-major axis
7,542.626 km
Eccentricity
0.0107
Inclination
99.7875°
RAAN
24.339°
Arg. of periapsis
49.4832°
True anomaly
102.9915°
Mean anomaly
101.7951°
Eccentric anomaly
102.39364°
Mean motion
3.31329 °/min
Orbital period
108.65 mins
BSTAR
0.0004014
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-05-07 15:04:41.920Z | 69.246° E | 2026-05-07 15:06:41.920Z | 50.295° ENE | 12.445° | 2026-05-07 15:08:41.920Z | 31.977° NE |
| 11 mins | 2026-05-07 16:47:41.920Z | 153.713° SSE | 2026-05-07 16:52:41.920Z | 45.733° ENE | 43.742° | 2026-05-07 16:58:41.920Z | 348.956° N |
| 6 mins | 2026-05-07 18:37:41.920Z | 243.893° WSW | 2026-05-07 18:39:41.920Z | 264.313° W | 16.165° | 2026-05-07 18:43:41.920Z | 303.897° NW |
| 4 mins | 2026-05-08 04:13:41.920Z | 76.35° E | 2026-05-08 04:14:41.920Z | 85.159° E | 12.015° | 2026-05-08 04:17:41.920Z | 110.854° ESE |
| 12 mins | 2026-05-08 05:57:41.920Z | 18.17° NNE | 2026-05-08 06:02:41.920Z | 64.105° ENE | 44.383° | 2026-05-08 06:09:41.920Z | 192.267° SSW |
| 7 mins | 2026-05-08 07:46:41.920Z | 330.111° NNW | 2026-05-08 07:49:41.920Z | 298.935° NW | 18.361° | 2026-05-08 07:53:41.920Z | 262.418° W |
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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