IUS R/B(1), 21640
Orbit data source: Space-Track
IUS R/B(1), 21640 is space debris in HEO originally from a launch on Fri, 02 Aug 1991 UTC launched from the Air Force Eastern Test Range (AFETR). 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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21640 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
UTC CSD
Mission
Spacecraft
Bus & Motor
ORBUS 21, Unknown motor
Mass
1,164 kg wet, ~1,164 kg dry
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Cyl, Unknown HBR
Radar Cross Section
7.708 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 IUS R/B(1)
1 21640U 91054C 26148.95150422 .00009509 00000-0 17884-2 0 9994
2 21640 26.6762 44.1014 6647108 205.5641 95.6634 3.12120355339429Epoch: 2026-05-28T22:50Z
TLE epoch observation values (Epoch: 2026-05-28T22:50:09.964Z)
Latitude
0.00008°
Longitude
175.08098°
Altitude
21,206.32 km
Speed
2.958 km/s
True Right ascension
02h 56m 26s
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
02:08:03
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
26,553.096 km
Perigee altitude
254.539 km
Semi-major axis
19,781.954 km
Eccentricity
0.66471
Inclination
26.6762°
RAAN
44.1014°
Arg. of periapsis
205.5641°
True anomaly
154.42246°
Mean anomaly
95.6634°
Eccentric anomaly
126.3411°
Mean motion
0.78008 °/min
Orbital period
461.49 mins
BSTAR
0.0017884
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Other satellites on launch #54 in the year 1991 (1991-08-02 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.IUS R/B(1) 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. |
|---|---|---|---|---|---|---|---|
| 148 mins | 2026-05-29 16:39:38.370Z | 111.238° ESE | 2026-05-29 17:38:38.370Z | 106.332° ESE | 31.902° | 2026-05-29 19:07:38.370Z | 82.141° E |
| 266 mins | 2026-05-29 22:54:38.370Z | 261.146° W | 2026-05-30 03:10:38.370Z | 231.169° WSW | 29.224° | 2026-05-30 03:20:38.370Z | 171.126° S |
| 185 mins | 2026-05-30 13:34:38.370Z | 106.22° ESE | 2026-05-30 16:37:38.370Z | 96.066° ESE | 24.565° | 2026-05-30 16:39:38.370Z | 95.854° ESE |
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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